Battery and related apparatus, production method and production device therefor

ABSTRACT

The present application discloses a battery and a related apparatus, production method and production device therefor. The battery includes: a battery cell, the battery cell including a pressure relief mechanism configured to be capable of being actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure; an attachment component adapted to be attached to the battery cell by an adhesive; and an isolation component configured to be capable of preventing the adhesive from being applied between the attachment component and the pressure relief mechanism. By providing the isolation component, it is possible to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism in an effective manner in a process of battery production. Meanwhile, application efficiency and accuracy of the adhesive could be improved, thereby improving production efficiency of the battery.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2021/082481, filed on Mar. 23, 2021 which claims priority toInternational Application No. PCT/CN2020/101443, filed on Jul. 10, 2020.The disclosures of the aforementioned applications are herebyincorporated by reference in their entireties.

TECHNICAL FIELD

The present application relates to the field of batteries, and inparticular, to a battery and a related apparatus, production method andproduction device therefor.

BACKGROUND

A chemical battery, electrochemical battery, or electrochemical cellrefers to a type of apparatus that converts chemical energy of positiveand negative active substances into electrical energy through a redoxreaction. Unlike an ordinary redox reaction, oxidation and reductionreactions are carried out separately, with the oxidation reaction takingplace at a negative electrode and the reduction reaction taking place ata positive electrode, and gain and loss of electrons are carried outthrough an external circuit, and thus a current is formed. This is anessential characteristic of all batteries. After long-term research anddevelopment, the chemical battery has ushered in a situation of greatvarieties and wide applications, for example, it may be a huge apparatusthat can accommodate a building, or a small apparatus in millimeter.With the development of modern electronic technology, high requirementsare put forward for the chemical battery. Every breakthrough in chemicalbattery technology brings revolutionary development of an electronicdevice. Many electrochemical scientists in the world have focused theirresearch and development interests in the field of chemical batteriesthat power electric automobiles.

As a kind of chemical battery, a lithium-ion battery has advantages ofsmall size, high energy density, high power density, multiple cycletimes, long storage time, and the like, and has been widely applied insome electronic devices, electric transport, electric toys and electricdevices. For example, currently, the lithium-ion battery is widelyapplied in mobile phones, notebook computers, electromobiles, electricautomobiles, electric airplanes, electric ships, electric toy cars,electric toy ships, electric toy airplanes, electric tools, or the like.

With the continuous development of lithium-ion battery technology,higher requirements are put forward for performance of the lithium-ionbattery. It is hoped that design factors in multiple aspects can beconsidered at the same time for the lithium-ion battery, and safetyperformance of the lithium-ion battery is particularly important.

SUMMARY

The present application provides a battery and a related apparatus,production method and production device therefor to improve safetyperformance of the battery.

According to a first aspect of the present application, a battery isprovided, including: a battery cell, the battery cell including apressure relief mechanism configured to be capable of being actuatedwhen an internal pressure or temperature of the battery cell reaches athreshold, to relieve the internal pressure; an attachment componentadapted to be attached to the battery cell by an adhesive; and anisolation component configured to be capable of preventing the adhesivefrom being applied between the attachment component and the pressurerelief mechanism.

By providing the isolation component, it is possible to prevent theadhesive from being applied between the attachment component and thepressure relief mechanism in an effective manner in a process of batteryproduction. Meanwhile, application efficiency and accuracy of theadhesive could be improved, thereby improving production efficiency ofthe battery.

In some embodiments, the pressure relief mechanism has an actuationregion, and the pressure relief mechanism is configured, when theinternal pressure or temperature of the battery cell reaches thethreshold, to be capable of forming a relief channel for relieving theinternal pressure in the actuation region.

Through the relief channel formed in the actuation region when thepressure relief mechanism is actuated, emissions of the battery cell areguided to be discharged outwards via the formed relief channel ifthermal runaway occurs in the battery, thereby improving safetyperformance of the battery.

In some embodiments, the isolation component is configured to at leastsurround the actuation region to prevent the adhesive from entering theactuation region.

The isolation component arranged in this manner can more reliablyprevent the adhesive from hindering normal actuation of the pressurerelief mechanism when the internal pressure or temperature of thebattery cell reaches a threshold, and prevent the adhesive from flowingin to block the relief channel, so as to block discharge of theemissions relieved from the battery cell. Therefore, the safetyperformance of the battery could be further improved.

In some embodiments, the isolation component has a main body and aprotrusion arranged to protrude from a surface of the main body, theprotrusion is arranged to correspond to a position of the actuationregion of the pressure relief mechanism, and the protrusion isconfigured to at least surround the actuation region to prevent theadhesive from entering the actuation region.

This arrangement can prevent the adhesive from being applied to asurface of the pressure relief mechanism in a simple and effectivemanner in a process of battery production, and thus prevent thehindering of the pressure relief mechanism when it is actuated.Moreover, this arrangement can be flexibly designed into such anisolation component according to actual needs that a single isolationcomponent can achieve the effect of isolating the adhesive with aplurality of protrusions respectively corresponding to actuation regionsof a plurality of pressure relief mechanisms. This helps to reduceproduction costs.

In some embodiments, the attachment component includes an avoidancestructure configured to provide a space allowing the pressure reliefmechanism to be actuated, where an avoidance chamber is formed betweenthe avoidance structure and the pressure relief mechanism.

The avoidance structure is arranged so that an operation space or actionspace required for effective actuation of the pressure relief mechanismcan be more reliably ensured. In addition, the avoidance chamber canprovide a buffer space for the emissions of the battery cell, therebyreducing impact pressure of the emissions of the battery cell to anexternal structure or component and further improving the safetyperformance of the battery.

In some embodiments, the isolation component is configured to at leastsurround a peripheral edge of a side of the avoidance chamber facing thepressure relief mechanism to prevent the adhesive from entering theavoidance chamber.

The isolation component arranged in this manner can more reliably ensurethat an operation space or action space required for effective actuationof the pressure relief mechanism provided by the avoidance chamber isnot partially occupied by the adhesive without affecting normalactuation of the pressure relief mechanism, and also can ensure that theavoidance chamber can play a role in providing a buffer space when theemissions are relieved from the battery cell.

In some embodiments, the isolation component has a main body and aprotrusion arranged to protrude from a surface of the main body, theprotrusion is arranged to correspond to a position of the avoidancechamber, and the protrusion is configured to at least surround aperipheral edge of a side of the avoidance chamber facing the pressurerelief mechanism to prevent the adhesive from entering the avoidancechamber.

This arrangement can prevent the adhesive from being applied to theavoidance chamber in a simple and effective manner in a process ofbattery production, so that the avoidance chamber can provide theoperation space required for the effective actuation of the pressurerelief mechanism. Moreover, this arrangement can be flexibly designedinto such an isolation component according to actual needs that a singleisolation component can achieve the effect of isolating the adhesivewith a plurality of protrusions respectively covering and being disposedon a plurality of avoidance chambers. This helps to reduce productioncosts.

In some embodiments, a height of the protrusion is greater than or equalto a predetermined application height of the adhesive, and theprotrusion is configured to be compressed when the battery cell isattached to the attachment component, to have a height consistent withthat of the adhesive.

This arrangement ensures that the protrusion can effectively prevent theadhesive from being applied between the attachment component and thepressure relief mechanism. Meanwhile, this enables the isolationcomponent not to affect reliable adhesion between the attachmentcomponent and the pressure relief mechanism, and actuation of thepressure relief mechanism. Moreover, when the battery cell and theattachment component of the battery are glued and pressed or engaged bythe adhesive coated on adhesive surfaces, the protrusion may becompressed to a height consistent with that of the adhesive, so that nogap is left between adhesive surfaces of the battery cell and theattachment component of the battery by the protrusion, thus reliablyensuring that the adhesive is isolated from a region where the pressurerelief mechanism is actuated and where a channel for the emissions isformed.

In some embodiments, the protrusion is formed on the surface of the mainbody by a blister process.

By adopting the blister process, the required isolation component may beprocessed and manufactured conveniently and at a low cost, andespecially in a case of forming a plurality of protrusions on a singleisolation component, it is particularly advantageous and economical toprocess and form a protrusion on the basis of a whole piece of sheet ora film by adopting the blister process.

In some embodiments, the protrusion includes a first protrusion and asecond protrusion, the first protrusion corresponds to a position of thepressure relief mechanism, the second protrusion is arranged around thefirst protrusion, and the first protrusion and the second protrusion areconfigured to prevent the adhesive from being applied between theattachment component and the pressure relief mechanism.

Protruding heights of the first protrusion and the second protrusion arebeneficial to preventing the adhesive from entering a space between thepressure relief mechanism and the attachment component when the adhesiveis applied, for example, so as to avoid the inflow adhesive to hinderthe normal operation of the pressure relief mechanism. Since the secondprotrusion is arranged around the first protrusion, the cooperation ofthe two in structure has a multiple prevention effect on the adhesive,and thus can intercept the adhesive more effectively and reliably.

In some embodiments, a groove is formed between the first protrusion andthe second protrusion, the groove is configured to accommodate at leastpart of the adhesive to prevent the adhesive from entering between theattachment component and the pressure relief mechanism.

The groove may accommodate at least part of the adhesive, which isequivalent to adding a barrier for the adhesive. When the secondprotrusion prevents its peripheral adhesive from flowing to the firstprotrusion, if the function of intercepting the adhesive by the secondprotrusion fails, the groove may further store a certain amount ofadhesive overflowing from the second protrusion, thereby preventing theadhesive from further flowing to the space between the pressure reliefmechanism and the attachment component.

In some embodiments, the second protrusion includes: a first side wallconfigured to be connected to the main body, the first side wall being awall shared by the second protrusion and the groove; a second side wallconfigured to be connected to the main body, the second side wall beingarranged opposite to the first side wall; and a connecting wallconfigured to connect the first side wall and the second side wall.

With this structure, not only has it a good effect of preventing theadhesive, but also it is simpler to process required modules, theprocessing is easy, and the costs are low.

In some embodiments, at least one of the first side wall and the secondside wall includes a first projection, and the first projection isarranged to protrude in a first direction, where the first direction isperpendicular to a protruding direction of the second protrusion.

By providing the first projection, an accommodating volume of the groovecan be increased, thereby accommodating more adhesive and preventing theadhesive from entering the space between the attachment component andthe pressure relief mechanism.

In some embodiments, at least one of the first side wall and the secondside wall is arranged obliquely relative to a direction in which theattachment component faces the battery cell.

By obliquely arranging the first side wall, an accommodating volume ofthe groove can be increased to accommodate more adhesive, therebyeffectively preventing the adhesive from entering between the pressurerelief mechanism and the attachment component. By obliquely arrangingthe second side wall, a coating area of the adhesive on a periphery ofthe second protrusion can be increased to ensure reliability ofadhesion. In addition, the oblique arrangements of the first side walland/or the second side wall are obliquely arranged facilitate demouldingof the insolation component in a producing process.

In some embodiments, the connecting wall includes a second projection,the second projection is arranged to protrude in a direction in whichthe attachment component faces the battery cell, or arranged to protrudein a direction in which the battery cell faces the attachment component.

The arrangement of the second projection makes a surface of theconnecting wall uneven, thereby forming a space that can accommodate theadhesive. In this way, when a height of the adhesive exceeds a height ofthe second protrusion to have a tendency of flowing to the firstprotrusion, the adhesive may first remain in the accommodating space onthe surface of the connecting wall, which is equivalent to addinganother barrier, and preventing the adhesive from flowing in a directionof the first protrusion continuously.

In some embodiments, the second protrusion includes a cavity, at leastone of the first side wall, the second side wall and the connecting wallis provided with an opening, and the opening is in communication withthe cavity, so that at least part of the adhesive enters the cavitythrough the opening.

By disposing an opening on at least one wall of the second protrusion,the adhesive located around the second protrusion can enter the cavitythrough the opening, which not only makes full use of a space occupiedby the second protrusion, but also may reduce the adhesive around thesecond protrusion to prevent the adhesive from entering the spacebetween the attachment component and the pressure relief mechanism.

In some embodiments, the first protrusion includes: a third side wallconfigured to be connected to the main body, the third side wall being awall shared by the first protrusion and the groove, and the third sidewall being arranged opposite to the first side wall; where the thirdside wall includes a third projection, the third projection is arrangedto protrude in a first direction, and the first direction isperpendicular to a protruding direction of the second protrusion; and/orthe third side wall is arranged obliquely relative to a direction inwhich the attachment component faces the battery cell.

In this way, an accommodating volume of the groove can be increased toaccommodate more adhesive, thereby effectively preventing the adhesivefrom entering between the pressure relief mechanism and the attachmentcomponent. Moreover, this arrangement helps to demould the isolationcomponent in a producing process.

In some embodiments, a width of the second protrusion is 1 mm to 8 mm.

In some embodiments, the second protrusion is an annular structure. Thesecond protrusion can prevent the adhesive on an outer periphery of thesecond protrusion from flowing to the first protrusion.

In some embodiments, a width of the groove is 1 mm to 8 mm.

In some embodiments, the second protrusion is an elastic componentattached to the surface of the main body. The elastic component has acertain elastic deformation ability, and serves as the second protrusionto prevent the adhesive, which can adapt to larger installation errors.

In some embodiments, the protrusion further includes a third protrusion,and the third protrusion is arranged around the second protrusion. Thenumber of protrusions arranged around the first protrusion is greater,and the effect of preventing the adhesive is better.

In some embodiments, a through hole is disposed on a wall of theprotrusion facing the pressure relief mechanism, and the through hole isconfigured such that emissions from the battery cell pass through theisolation component when the pressure relief mechanism is actuated.

A through hole disposed on a top wall of the first protrusion can notonly provide a space for actuation of the pressure relief mechanism, butalso form a channel for the emissions. Moreover, the through hole canallow the adhesive to enter the through hole when the preventionfunctions of the first protrusion, the groove and the second protrusionall fail, to avoid the adhesive to adhere to the pressure reliefmechanism to affect the smooth opening of the pressure relief mechanism.

In some embodiments, the through hole is arranged around the pressurerelief mechanism to prevent the adhesive from entering between thepressure relief mechanism and the attachment component. This avoids theadhesive to adhere to the pressure relief mechanism to affect the smoothopening of the pressure relief mechanism.

In some embodiments, the through hole is configured to correspond to theposition of the actuation region, and the through hole is arrangedaround the actuation region to prevent the adhesive from enteringbetween the actuation region and the attachment component. This avoidsthe adhesive to adhere to the pressure relief mechanism to affect thesmooth opening of the pressure relief mechanism.

In some embodiments, the battery includes a plurality of battery cells,and each of the plurality of battery cells includes the pressure reliefmechanism; and the isolation component includes at least one protrusion;where the protrusion is in one-to-one correspondence to the pressurerelief mechanism, or the protrusion corresponds to at least two pressurerelief mechanisms.

In this way, a process of assembling the isolation component to theattachment component of the battery is relatively simple, and meanwhile,the adhesive coated or to be coated can be isolated from pressure reliefmechanisms or relief regions thereof of the plurality of battery cellsincluded in the battery in a relatively independent manner by using aplurality of protrusions. Moreover, this can also assist an operator toproperly complete the coating of the adhesive with higher efficiencywhen coating the adhesive, so that the operator does not need tocarefully coat the adhesive, which helps to reduce assembling costs andproduction costs of the battery. When the protrusion corresponds to atleast two pressure relief mechanisms, assembly accuracy can also bereduced to adapt to greater installation errors.

In some embodiments, the isolation component is configured to be capableof being damaged by emissions from the battery cell when the pressurerelief mechanism is actuated.

Thus, if thermal runaway occurs in the battery cell, the isolationcomponent can be damaged by the emissions flowing out with the actuationof the pressure relief mechanism, thereby forming a channel for theemissions to flow out, which could improve the safety of the battery.

In some embodiments, the isolation component is made of a thermoplasticmaterial having a melting point not greater than a discharge temperatureof the emissions.

With this design, the isolation component has relatively high structuralstrength in a general use state where thermal runaway does not occur inthe battery cell, and can be damaged by high-temperature andhigh-pressure emissions in a relatively short time in an emergency casewhere thermal runaway occurs in the battery cell, so that the emissionsare quickly discharged from the battery cell.

In some embodiments, the isolation component includes a coating forpreventing the adhesive from being applied thereto. Thus, the isolationcomponent may also be achieved by a structure without a protrusion.

In some embodiments, the attachment component includes a thermalmanagement component for accommodating a fluid to lower a temperature ofthe battery cell. By providing the thermal management component, thetemperature of the battery cell can be controlled more flexibly andactively, and the risk of thermal runaway of the battery cell can bereduced.

In some embodiments, the avoidance structure is formed in the thermalmanagement component, and the avoidance structure includes an avoidancebottom wall and an avoidance side wall surrounding the avoidancechamber. This arrangement achieves the design of the thermal managementcomponent and the avoidance structure in a simple manner and at a lowercost, and integration the avoidance structure into the thermalmanagement component helps to reduce the occupation of space, andfurther helps to improve energy density of the battery.

In some embodiments, the avoidance side wall is configured to be damagedwhen the pressure relief mechanism is actuated, such that the fluidflows out.

This arrangement enables the fluid to flow out if necessary at a lowcost and in a simple manner, so that the fluid is used to quickly reducea temperature of the emissions discharged from the battery cell in thecase of thermal runaway, to further improve the safety performance ofthe battery.

According to a second aspect of the present application, an apparatus isprovided, which includes the battery described in the foregoing firstaspect, and the battery is configured to provide electrical energy tothe apparatus.

According to a third aspect of the present application, a method forproducing a battery is further provided, including: providing aplurality of battery cells, at least one battery cell of the pluralityof battery cells including: a pressure relief mechanism configured to becapable of being actuated when an internal pressure or temperature ofthe battery cell reaches a threshold, to relieve the internal pressure;providing an attachment component adapted to be attached to the batterycell by an adhesive; providing an isolation component configured to becapable of preventing the adhesive from being applied between theattachment component and the pressure relief mechanism; and applying theadhesive to attach the battery cell to the attachment component.

By providing the isolation component, it is possible to prevent theadhesive from being applied between the attachment component and thepressure relief mechanism in an effective manner in a process of batteryproduction. Meanwhile, application efficiency and accuracy of theadhesive could be improved, thereby improving production efficiency ofthe battery.

In some embodiments, the pressure relief mechanism has an actuationregion, and the pressure relief mechanism is configured, when theinternal pressure or temperature of the battery cell reaches thethreshold, to be capable of forming a relief channel for relieving theinternal pressure in the actuation region; and the isolation componenthas a main body and a protrusion arranged to protrude from a surface ofthe main body, the protrusion is arranged to correspond to a position ofthe actuation region of the pressure relief mechanism, and theprotrusion is configured to at least surround the actuation region toprevent the adhesive from entering the actuation region.

Thus, it is possible to prevent the adhesive from being applied to asurface of the pressure relief mechanism in a simple and effectivemanner in a process of battery production, and thus prevent thehindering of the pressure relief mechanism when it is actuated.Moreover, an isolation component may be flexibly processed andmanufactured according to actual needs, so that the manufactured singleisolation component can achieve the effect of isolating the adhesivewith a plurality of protrusions respectively corresponding to actuationregions of a plurality of pressure relief mechanisms, which is helpfulfor reducing production costs.

In some embodiments, the attachment component includes an avoidancestructure configured to provide a space allowing the pressure reliefmechanism to be actuated, and an avoidance chamber is formed between theavoidance structure and the pressure relief mechanism; and the isolationcomponent has a main body and a protrusion arranged to protrude from asurface of the main body, the protrusion is arranged to correspond to aposition of the avoidance chamber, and the protrusion is configured toat least surround a peripheral edge of a side of the avoidance chamberfacing the pressure relief mechanism to prevent the adhesive fromentering the avoidance chamber.

Thus, in a process of battery production, it is possible to prevent theadhesive in a simple and effective manner from being applied to theavoidance chamber which may hinder the actuation of the pressure reliefmechanism and forms a channel for the emissions to flow and passthrough, without hindering the pressure relief mechanism from givingfull play to its designed function. Moreover, an isolation component maybe flexibly processed and manufactured according to actual needs, sothat the manufactured single isolation component can achieve the effectof isolating the adhesive with a plurality of protrusions respectivelycorresponding to a plurality of avoidance chambers, which is helpful forreducing production costs.

In some embodiments, the providing the isolation component includesforming the protrusion on the surface of the main body by a blisterprocess. By adopting the blister process, the required isolationcomponent may be processed and manufactured conveniently and at a lowcost.

According to a fourth aspect of the present application, a device forproducing a battery is provided, including: a battery cell productionmodule for producing a plurality of battery cells, at least one batterycell of the plurality of battery cells including: a pressure reliefmechanism configured to be capable of being actuated when an internalpressure or temperature of the battery cell reaches a threshold, torelieve the internal pressure; an attachment component production modulefor producing an attachment component adapted to be attached to thebattery cell by an adhesive; an isolation component production modulefor producing an isolation component configured to be capable ofpreventing the adhesive from being applied between the attachmentcomponent and the pressure relief mechanism; and an assembling modulefor mounting and fixing the isolation component relative to the batterycell or the attachment component, and applying the adhesive to attachthe battery cell to the attachment component.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings described herein are intended to provide afurther understanding of the present application and constitute a partof the present application. The illustrative embodiments of the presentapplication and the description thereof are used to explain the presentapplication and do not constitute an undue limitation to the presentapplication. In the drawings:

FIG. 1 shows a schematic structural diagram of some embodiments of avehicle using a battery of the present application;

FIG. 2 shows a schematic exploded view of a battery cell according tosome embodiments of the present application;

FIG. 3 shows a schematic perspective view of a battery cell according tosome embodiments of the present application;

FIG. 4 shows a schematic perspective view of a battery cell according tosome embodiments of the present application;

FIG. 5 shows a schematic exploded view of a battery according to someembodiments of the present application;

FIG. 6 shows a schematic exploded view of a battery according to someembodiments of the present application;

FIG. 7 illustrates a sectional view of a battery according to someembodiments of the present application;

FIG. 8 shows an enlarged view of a part B of the battery shown in FIG. 7;

FIG. 9 shows a perspective view of an isolation component according tosome embodiments of the present application;

FIG. 10 shows an exploded view of an isolation component that has notyet been attached to a thermal management component according to someembodiments of the present application;

FIG. 11 shows an exploded view of an isolation component that has beenattached to a thermal management component according to some embodimentsof the present application;

FIG. 12 shows a top view of a thermal management component according tosome embodiments of the present application;

FIG. 13 shows a sectional view of the thermal management component ofthe present application shown in FIG. 12 in a direction of A-A;

FIG. 14 shows a bottom view of the thermal management component of thepresent application shown in FIG. 12 ;

FIG. 15 shows a perspective view of an isolation component according tosome embodiments of the present application;

FIG. 16 shows an enlarged view of a part C of the insolation componentof the present application shown in FIG. 15 ;

FIG. 17 shows a sectional view of the insolation component of thepresent application shown in FIG. 15 in a direction of D-D;

FIG. 18 to FIG. 27 show enlarged views of a part E of the isolationcomponent of some embodiments of the present application shown in FIG.17 ;

FIG. 28 shows a perspective view of an isolation component according tosome embodiments of the present application;

FIG. 29 shows an enlarged view of a part F of the insolation componentof the present application shown in FIG. 28 ;

FIG. 30 shows a sectional view of the isolation component of the presentapplication shown in FIG. 28 in a direction of G-G;

FIG. 31 to FIG. 32 show enlarged views of an H part of the isolationcomponent of some embodiments of the present application shown in FIG.30 ;

FIG. 33 to FIG. 35 show schematic diagrams of a correspondingrelationship between a protrusion of an isolation component and apressure relief mechanism according to some embodiments of the presentapplication;

FIG. 36 shows a schematic flowchart of some embodiments of a method forproducing a battery according to the present application; and

FIG. 37 shows a schematic structural diagram of some embodiments of adevice for producing a battery according to the present application.

DESCRIPTION OF EMBODIMENTS

To make the objectives, technical solutions, and advantages of thepresent application clearer, the technical solutions in embodiments ofthe present application will be clearly and completely described belowwith reference to the accompanying drawings showing a plurality ofembodiments according to the present application. It should beunderstood that, the described embodiments are merely some of, ratherthan all of, the embodiments of the present application. All the otherembodiments obtained by those of ordinary skill in the art based on theembodiments disclosed in the present application without creativeefforts shall fall within the scope of protection of the presentapplication.

Unless otherwise defined, all technical and scientific terms used in thepresent application have the same meanings as those commonly understoodby those skilled in the technical art to which the present applicationpertains. Terms used in the specification of the present application aremerely for the purpose of describing specific embodiments, but are notintended to limit the present application. The terms “comprising”,“including”, “having”, “possessing”, “containing”, “involving” and thelike in the specification, the claims as well as the foregoingdescription of the foregoing accompanying drawings of the presentapplication are open words. Therefore, a method or apparatus“comprising”, “including” or “having” for example one or more steps orelements, has one or more steps or elements, but is not limited tomerely having the one or more elements. The terms “first”, “second”, andthe like in the specification, the claims, or the foregoing accompanyingdrawings of the present application, are intended to distinguish betweendifferent objects, rather than to describe a specific order orprimary-secondary relationship. In addition, the terms “first” and“second” are only intended for the purpose of description, and shall notbe understood as an indication or implication of relative importance orimplicit indication of the quantity of indicated technical features.Therefore, a feature limited by “first” or “second” may explicitly orimplicitly include one or more features. In the description of thepresent application, unless otherwise provided, “a plurality of” meanstwo or more than two.

In the description of the present application, it should be understoodthat orientations or positional relationships indicated by terms such as“center”, “crosswise”, “length”, “width”, “up”, “down”, “front”, “rear”,“left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”,“outside”, “axial direction”, “radial direction” and “circumferentialdirection” are orientations or positional relationships shown based onthe drawings, and the terms are merely for convenience of describing thepresent application and for simplifying the description, but forindicating or implying that an indicated apparatus or element must havea specific orientation, and must be constructed and operated in aspecific orientation, which thus may not be understood as limiting thepresent application.

In the description of the present application, it should be noted that,unless explicitly specified and defined otherwise, terms “installation”,“interconnection”, “connection” and “attachment” should be understoodbroadly, for example, they may either be a fixed connection, or adetachable connection, or an integral connection; and they may either bea direct connection, or an indirect connection through an intermediary,and they may be an internal connection between two elements. Those ofordinary skill in the art may appreciate the specific meanings of theforegoing terms in the present application according to specificconditions.

The phrase “embodiment” mentioned in the present application means thatthe specific features, structures, and characteristics described withreference to the embodiments may be included in at least one embodimentof the present application. The phrase at various locations in thespecification does not necessarily refer to the same embodiment, or anindependent or alternate embodiment that is mutually exclusive fromanother embodiment. Those skilled in the art understand, in explicit andimplicit manners, that the embodiments described in the presentapplication may be in combination with another embodiment.

As described above, it should be emphasized that the term“comprising/including”, when used in this specification, is used toclearly specify the presence of stated features, integers, steps orassemblies, but do not preclude the presence or addition of one or moreother features, integers, steps, or components or groups of features,integers, steps or components. As used in the present application, thesingular form “a”, “an” and “the” include plural forms unless thecontext clearly dictates otherwise.

The terms “a” and “an” in this specification can mean one, but may havethe same meaning as “at least one” or “one or more”. The term “about”generally means plus or minus 10%, or more specifically plus or minus5%, of the mentioned value. The term “or” used in the claims means“and/or” unless it is clearly stated that it only refers to analternative solution.

The term “and/or” in the present application merely describes anassociation relationship between associated objects, and indicates thatthere may be three relationships. For example, A and/or B may indicatethree cases: A exists alone, both A and B exist, and B exists alone. Inaddition, the character “/” in the present application generallyindicates that the associated previous and next objects are in therelationship of “or”.

A battery mentioned in the field can be divided into a primary batteryand a rechargeable battery according to whether it is rechargeable. Theprimary battery (Primary Battery) is also known as a “disposable”battery or a galvanic battery, because after its power is exhausted, itcannot be recharged and can only be discarded. The rechargeable batteryis also called a secondary battery (Secondary Battery), a second-levelbattery, or a storage battery. Manufacturing materials and processes ofthe rechargeable battery are different from those of the primarybattery. Its advantage is that it can be cycled multiple times afterbeing charged, and output current load capacity of the rechargeablebattery is higher than that of most primary batteries. At present,common types of rechargeable batteries are: a lead-acid battery, a Ni-MHbattery and a lithium-ion battery. The lithium-ion battery has theadvantages such as light weight, large capacity (1.5 to 2 times that ofNi-MH battery of the same weight), and no memory effect, and has a verylow self-discharge rate, so even if its price is relatively high, itstill gets widely used. The lithium-ion battery is also used in batteryelectric vehicles and hybrid vehicles. The capacity of lithium-ionbattery for this purpose is relatively low, but it has a larger outputand charging current, and a longer service life, but a higher cost.

A battery described in an embodiment of the present application refersto a rechargeable battery. Hereinafter, the concept of the presentapplication will be described mainly by an example of a lithium-ionbattery. It should be understood that any other suitable type of arechargeable battery is applicable. The battery mentioned in theembodiment of the present application refers to a single physical moduleincluding one or more battery cells to provide a higher voltage andcapacity. For example, the battery mentioned in the present applicationmay include a battery module, a battery pack, and the like. The batterycell includes a positive electrode sheet, a negative electrode sheet, anelectrolytic solution and a separator, and is a basic structural unit ofa battery module and a battery pack. Generally, the battery cell isdivided into three types according to the way of packaging: acylindrical battery cell, a prismatic battery cell and a pouch batterycell.

The operation of a lithium-ion battery cell mainly relies on movement oflithium ions between the positive electrode sheet and the negativeelectrode sheet. The lithium ion battery cell uses one embedded lithiumcompound as one electrode material. Currently, main common materialsused as a cathode material of a lithium-ion battery are: lithium cobaltoxide (LiCoO₂), lithium manganese oxide (LiMn₂O₄), lithium nickel oxide(LiNiO₂) and lithium iron phosphate (LiFePO₄). The separator is disposedbetween the positive electrode sheet and the negative electrode sheet toform a thin film structure with three layers of materials. The thin filmstructure is generally made into an electrode assembly in a desiredshape by winding or stacking. For example, a thin film structure withthree layers of materials in a cylindrical battery cell is wound into acylindrical electrode assembly, while a thin film structure in aprismatic battery cell is wound or stacked into an electrode assembly ina substantially cuboid shape.

A plurality of battery cells may be connected in series and/or inparallel via electrode terminals for various applications. In somehigh-power applications such as electric automobiles, application of abattery includes three levels: a battery cell, a battery module, and abattery pack. The battery module is formed by electrically connecting acertain number of battery cells together and putting them in a frame inorder to protect the battery cells from external impact, heat,vibration, or the like. The battery pack is a final state of a batterysystem installed in an electric automobile. Most existing battery packsare made by assembling various control and protection systems such as abattery management system (BMS) and a thermal management component onone or more battery modules. With the development of technology, thelevel of battery module may be omitted, that is, a battery pack isdirectly formed from a battery cell. This improvement allows the batterysystem to significantly reduce the number of components while increasingweight energy density and volume energy density. The battery mentionedin the present application includes a battery module or a battery pack.

With respect to the battery cell, the main safety hazard comes from thecharging and discharging processes, and in order to effectively avoidunnecessary risks and losses, at least triple protection measures aregenerally taken for the battery cell. Specifically, the protectionmeasures include at least a switching element, a properly selectedseparator material and a pressure relief mechanism. The switchingelement refers to an element that can stop the charging or dischargingof the battery when the temperature or resistance in the battery cellreaches a certain threshold. The separator is configured to isolate apositive electrode sheet from a negative electrode sheet, and mayautomatically dissolve micron-sized (or even nanoscale) microporesattached to the separator when the temperature rises to a certain value,so that lithium ions cannot pass through the separator and the internalreaction of the battery cell is terminated.

A pressure relief mechanism refers to an element or component that canbe actuated when an internal pressure or internal temperature of abattery cell reaches a predetermined threshold, to relieve the internalpressure and/or internal substances. The pressure relief mechanism mayspecifically take the form of an anti-explosion valve, a gas valve, apressure relief valve, a safety valve, or the like, and may specificallyadopt a pressure-sensitive or temperature-sensitive element orstructure. That is, when the internal pressure or temperature of thebattery cell reaches a predetermined threshold, the pressure reliefmechanism performs an action or a weakened structure disposed in thepressure relief mechanism is damaged, thereby forming an opening orchannel for internal pressure relief. The threshold referred to in thepresent application may be a pressure threshold or a temperaturethreshold. The threshold design varies according to different designrequirements. For example, the threshold may be designed or determinedaccording to an internal pressure or internal temperature value of abattery cell that is considered to have danger and a risk of being outof control. Moreover, the threshold may, for example depend on thematerial of one or more of the positive electrode sheet, the negativeelectrode sheet, the electrolytic solution and the separator in thebattery cell.

The “actuation” mentioned in the present application means that thepressure relief mechanism acts or is activated to a certain state, sothat the internal pressure of the battery cell can be relieved. Theaction executed by the pressure relief mechanism may include but be notlimited to: at least a portion of the pressure relief mechanism beingfractured, broken, torn or opened and so on. When the pressure reliefmechanism is actuated, high-temperature and high-pressure substancesinside the battery cell are discharged outwards from an actuatedposition as emissions. In this way, the pressure of the battery cell canbe relieved under a controllable pressure or temperature, therebyavoiding potential, more serious accidents. The emissions from thebattery cell mentioned in the present application include but are notlimited to: an electrolytic solution, dissolved or split positive andnegative electrode sheets, fragments of a separator, high-temperatureand high-pressure gas generated by reaction, flame, or the like. Thehigh-temperature and high-pressure emissions are discharged in adirection in which the pressure relief mechanism of the battery cell isprovided, and more specifically, may be discharged in a direction towarda region where the pressure relief mechanism is actuated. The strengthand destructive power of such emissions may be very great, and may evenbe great enough to break through one or more structures such as a coverbody in this direction.

In some traditional solutions, the pressure relief mechanism isgenerally disposed on a cover plate of the battery cell. In someimproved technical solutions, the pressure relief mechanism may also bearranged on a housing structure on the battery cell on another side orin another direction. However, regardless of an arrangement manner orarrangement position of the pressure relief mechanism, it is necessaryto attach or assemble the battery cell to an attachment component byusing the attachment component properly arranged in the battery throughan adhesive (also referred to as glue or a binder), where the attachmentcomponent may specifically include an attachment component in thebattery such as a thermal management component and a support component,and the adhesive may adopt, for example, thermally conductive silicagel, epoxy resin adhesive, polyurethane adhesive, or the like.

It can be understood that the support component referred to in thepresent application may generally be understood as a component forproviding support for the battery cell or resisting the gravity of thebattery cell, which can generally be attached for example to a bottomwall or bottom of the housing of the battery cell to support or fix thebattery cell thereon. The thermal management component is a componentfor accommodating a fluid to adjust the temperature of the battery cell,where the fluid here may be liquid or gas, and temperature adjustmentrefers to heating or cooling or lowering the temperature of the batterycell. Typically, the thermal management component for cooling orlowering the temperature of the battery cell may also be referred to asa cooling component, a cooling system, a cooling plate, or the like,which accommodates a cooling medium such as cooling liquid or coolinggas, where the cooling medium may be designed to flow in a circulatingmanner to achieve better temperature adjustment effects. The coolingmedium may specifically use water, a mixture of water and ethyleneglycol, air, or the like. The attachment component generally refers to apart of the battery that is adhered with the battery cell by theadhesive. As mentioned above, the attachment component may be providedby or composed of the thermal management component or the supportcomponent, besides, the attachment component may also be provided by anyother suitable component in the battery.

Regardless of which part of the battery is used as the attachmentcomponent, this manner of assembling the battery cell to the batteryusing the adhesive generally refers to applying or coating the adhesiveon adhesive surfaces on which the attachment component and the batterycell are attached to each other, and then engaging the adhesive surfacescorresponding to the battery cell and the attachment component in asurface adhering manner by using the adhesive force and cohesive forcegenerated after the curing of the adhesive, and thus the purpose ofassembling the battery cell to the attachment component may be achieved.This design and its processing manner are widely applied because of itsadvantages of easy implementation, simple processes, low costs and firmand reliable attachment.

However, after conducting a great deal of research and experiments, theinventor of the present application found that the widely adopted designof attaching the battery cell to the attachment component in the batteryby using the adhesive may unexpectedly have an adverse effect on thedesign of the pressure relief mechanism aimed at providing reliableguarantee for the use safety of the battery cell.

Specifically, on the one hand, when the adhesive is coated, someadhesive may flow into a region related to the actuation of the pressurerelief mechanism due to careless coating of an excessive adhesive in acertain region or inclination of the adhesive surface coated with theadhesive. In this case, if the inflow adhesive is not cleanedadditionally, this portion of the adhesive after curing is possible toadversely affect the actuation of the pressure relief mechanism, andeven block or partially block a channel or opening that is formed whenthe pressure relief mechanism is actuated for the emissions to flow out,thereby affecting the relief of the emissions.

On the other hand, the pressure relief mechanism in the battery cell isactuated when the internal pressure or temperature of the battery cellreaches a predetermined threshold, the high-temperature andhigh-pressure substances inside the battery cell are discharged outwardsfrom an actuated position as emissions. At this time, thehigh-temperature and high-pressure emissions enable, due to its owndestructive power and/or high temperature in a relieving process, anadhesive coated on an adhesive surface near a path where emissions passby to be melted and flow into a region related to the actuation of thepressure relief mechanism, such as a position where the pressure reliefmechanism is actuated, or a channel or opening formed by the actuationof the pressure relief mechanism for emissions to flow out, therebyadversely affecting relief of the emissions.

In order to ensure that the pressure relief mechanism may play itsdesigned function to relieve the high-temperature and high-pressureemissions inside the battery cell when necessary, it is necessary toprevent, in a certain manner, the adhesive such as thermally conductivesilica gel from being applied to a region that may affect the actuationof the pressure relief mechanism or may affect the pressure reliefmechanism to form an opening or channel for the emissions to flow out.However, for this reason, abandonment of the manner of assembling thebattery cell to the attachment component in the battery with theadhesive, or addition of a barrier structure around an adhesive surfaceon which the adhesive needs to be applied to the battery cell or theattachment component will significantly increase the manufacturingdifficulty and production costs of the battery. Therefore, how to ensurethat the pressure relief mechanism disposed in the battery cell can playits designed function so as to ensure the use safety of the battery,while keeping the manufacturing difficulty and production costs of thebattery at a relatively expected low level as much as possible is adifficult technical problem for a researcher or a person skilled in theart to be solved.

In order to solve or at least partially solve the foregoing problems andother potential problems of a battery in the prior art, the inventor ofthe present application proposes a battery, the design of which will bedescribed in detail below. It can be understood that the batterydescribed in the embodiment of the present application is applicable tovarious apparatuses using batteries, such as mobile phones, portabledevices, notebook computers, electromobiles, electric automobiles,ships, spacecrafts, electric toys and electric tools. For example, thespacecrafts include airplanes, rockets, space shuttles, spaceships, andthe like; the electric toys include fixed or mobile electric toys, suchas game consoles, electric vehicle toys, electric ship toys and electricairplane toys; the electric tools include electric metal cutting tools,electric grinding tools, electric assembling tools and electric railwaytools, such as electric drills, electric grinders, electric spanners,electric screwdrivers, electric hammers, electric impact drills,concrete vibrators, and electric planers.

The battery described in an embodiment of the present application is notonly applicable to the device described above, but also applicable toall devices using batteries. However, the following embodiments are alldescribed by an example of an electric automobile for brevity.

For example, as shown in FIG. 1 , FIG. 1 is a simplified schematicdiagram of a vehicle 1 according to an embodiment of the presentapplication. The vehicle 1 may be a fuel-powered vehicle, a gas-poweredvehicle or a new energy vehicle, and the new energy vehicle may be afull electric vehicle, a hybrid vehicle, an extended-range vehicle, orthe like. As shown in FIG. 1 , the vehicle 1 may be internally providedwith a battery 10, for example, the battery 10 may be disposed at thebottom, head or tail of the vehicle 1. The battery 10 may be used forpower supply to the vehicle 1, for example, the battery 10 may be usedas an operation power source of the vehicle 1. Moreover, the vehicle 1may further include a controller 30 and a motor 40. The controller 30 isconfigured to control the battery 10 to supply power to the motor 40,for example, for a working power demand of the vehicle 1 during startup,navigation and driving. In another embodiment of the presentapplication, the battery 10 may be used not only as an operation powersource of the vehicle 1, but also as a driving power source of thevehicle 1, replacing or partially replacing fuel or natural gas toprovide driving power for the vehicle 1. The battery 10 referred tobelow may also be understood as a battery pack including a plurality ofbattery cells 20.

As shown in FIGS. 2-4 , a battery cell 20 includes a case 21, anelectrode assembly 22 and an electrolytic solution, where the electrodeassembly 22 is accommodated in the case 21 of the battery cell 20, andthe electrode assembly 22 includes a positive electrode sheet, anegative electrode sheet and a separator. A material of the separatormay be polypropylene (PP), polyethylene (PE), or the like. The electrodeassembly 22 may be a winding structure or a laminated structure. Thecase 21 includes a housing 211 and a cover plate 212. The housing 211includes an accommodation chamber 211 a formed from a plurality of wallsand an opening 211 b. The cover plate 212 is arranged at the opening 211b to close the accommodation chamber 211 a. In addition to the electrodeassembly 22, the accommodation chamber 211 a also accommodates anelectrolytic solution. The positive electrode sheet and the negativeelectrode sheet in the electrode assembly 22 are generally provided withtabs, and the tabs generally include a positive tab and a negative tab.

Specifically, the positive electrode sheet includes a positive electrodecurrent collector and a positive electrode active material layer. Thepositive electrode active material layer is coated on a surface of thepositive electrode current collector, the positive electrode currentcollector not coated with the positive electrode active material layerprotrudes from the positive electrode current collector coated with thepositive electrode active material layer, and the positive electrodecurrent collector not coated with the positive electrode active materiallayer is used as the positive tab. A material of the positive electrodecurrent collector may be aluminum, and the positive electrode activematerial may be lithium cobalt oxides, lithium iron phosphate, ternarylithium, lithium manganate, or the like. The negative electrode sheetincludes a negative electrode current collector and a negative electrodeactive material layer. The negative electrode active material layer iscoated on a surface of the negative electrode current collector, thenegative electrode current collector not coated with the negativeelectrode active material layer protrudes from the negative electrodecurrent collector coated with the negative electrode active materiallayer, and the negative electrode current collector not coated with thenegative electrode active material layer is used as the negative tab. Amaterial of the negative electrode current collector may be copper, andthe negative electrode active material may be carbon, silicon, or thelike. In order to ensure that no fusing occurs when a large currentpasses, there are a plurality of positive tabs which are stackedtogether, and there are a plurality of negative tabs which are stackedtogether. The tabs are connected to a positive electrode terminal 214 aand a negative electrode terminal 214 b located outside the battery cell20 through connecting members 23. In the description of the presentapplication, the positive electrode terminal 214 a and the negativeelectrode terminal 214 b are also collectively referred to as anelectrode terminal 214. For a prismatic battery cell, as shown in FIG. 2and FIG. 4 , the electrode terminal 214 may generally be disposed on thecover plate 212.

FIGS. 5-6 show exploded views of a battery 10 according to someembodiments of the present application. As shown in FIGS. 5-6 , thebattery 10 may include a box 11 for enclosing a plurality of batterycells 20, and the box 11 can avoid liquid or other foreign matters toaffect the charging or discharging of the battery cells 20, where theplurality of battery cells 20 are electrically connected to each othervia a bus component 12, and the battery 10 may provide a higher voltageafter the plurality of battery cells 20 are connected in series or inparallel through the bus component 12. The box 11 may include a coverbody 111 and a box shell 112. The cover body 111 and the box shell 112may be combined together in a sealing manner to jointly enclose and forman electrical chamber 11 a for accommodating the plurality of batterycells 20, and certainly, they may also be combined with each other in anunsealing manner. In some embodiments, a thermal management component 13may constitute a portion of the box 11 for accommodating the pluralityof battery cells 20. For example, the thermal management component 13may constitute a side portion 112 b of the box shell 112 of the box 11or constitute a portion of the side portion 112 b, or as shown in FIG. 6, a thermal management component 13 may constitute a bottom portion 112a of the box shell 112 of the box 11 or constitute a portion of thebottom portion 112 a. This design that the thermal management component13 is used to constitute a portion of the box shell 112 is helpful tomake a structure of the battery 10 more compact, improve effectiveutilization of space, and improve energy density.

In some alternative embodiments, the battery 10 may further include aprotective member 115, as shown in FIGS. 6 and 7 . The protective member115 in the present application refers to a component arranged on a sideof the thermal management component 13 away from the battery cell 20 toprovide protection for the thermal management component 13 and thebattery cell 20. In these embodiments, a collection chamber 11 b may bearranged between the protective member 115 and the thermal managementcomponent 13.

Referring to FIGS. 7-8 , at least one battery cell 20 in the battery 10includes a pressure relief mechanism 213. In some embodiments, eachbattery cell 20 in the battery 10 is provided with a pressure reliefmechanism 213, or a pressure relief mechanism 213 may be disposed onsome battery cells 20 in the plurality of battery cells 20, which may bemore prone to thermal runaway due to their positions in the battery 10or characteristics of the other battery cells 20. The pressure reliefmechanism 213 is capable of being actuated when an internal pressure ortemperature of the battery cell 20 reaches a predetermined threshold, torelieve the internal pressure of the battery cell 20.

The battery 10 also includes an attachment component adapted to beattached to the battery cell 20 by an adhesive, and the attachmentcomponent may be, for example, a thermal management component 13, asupport component, or the like in the battery 10. In order to avoid theadhesive such as thermally conductive silica gel to be applied betweenthe attachment component and the pressure relief mechanism 213, therebynot preventing or not affecting the pressure relief mechanism 213 frombeing actuated and performing its designed function as described above,that is, a function that the pressure relief mechanism 213 is actuatedwhen the internal pressure or temperature of the battery cell 20 isrelatively large to form a channel or opening for relieving the internalpressure of the battery cell 20, the battery 10 may also be providedwith an isolation component 14, which is capable of preventing theadhesive from being applied between the attachment component and thepressure relief mechanism 213. Hereinafter, an embodiment in which theattachment component is the thermal management component 13 and thedesign of the isolation component 14 involved therein will beexemplified below. It can be understood that in a case where theattachment component is the support component, a structure orconfiguration substantially the same as or similar to that of theisolation component 14 may be applied.

In FIG. 8 , an isolation component 14 is schematically depicted, and theisolation component 14 at least surrounds an actuation region of apressure relief mechanism 213 to prevent an adhesive from entering theactuation region. In this way, it can avoid any hindrance or adverseinfluence on the execution of the actuation action of the pressurerelief mechanism due to the adhesive flowing into the actuation regionfrom any direction.

The isolation component 14 adopted in various embodiments of the presentapplication may adopt various possible constructions, so that theforegoing adhesive used for assembling the battery cell 20 to theattachment component can be isolated from a space between the attachmentcomponent and the pressure relief mechanism 213, or so that the coatedadhesive can be isolated from a space that may affect the pressurerelief mechanism 213 to perform its designed function of pressure reliefonce the adhesive flows in. As will be seen in the following descriptionof some preferred embodiments, the isolation component 14 may bedesigned to surround a partial region of the pressure relief mechanism213, where the partial region can form a relief channel relieving theinternal pressure of the battery cell 20 when the pressure reliefmechanism 213 is actuated (which may be referred to as an actuationregion or a relief region), for the emissions to flow out, or may alsobe attached to a region on the attachment component such as the thermalmanagement component 13 corresponding to the pressure relief mechanism213, so as to surround a space that is provided by the attachmentcomponent and allows the pressure relief mechanism 213 to be actuated(e.g., an avoidance structure 134 described below), or the like.

In some embodiments, the isolation component 14 may be attached to aregion on the attachment component such as the thermal managementcomponent 13 corresponding to the pressure relief mechanism 213 beforecoating the adhesive. It should be noted that any component in thebattery that is adhered together with the battery cell 20 by theadhesive may be considered as the attachment component or a portion ofthe attachment component, and these components may use the isolationcomponent 14, that is, the isolation component 14 may be attachedthereto before the adhesive is coated. In this way, when the adhesive iscoated, the isolation component 14 can prevent the adhesive fromentering a region on the attachment component corresponding to thepressure relief mechanism 213, especially corresponding to a region onthe pressure relief mechanism 213 for actuation to form a relief channelrelieving the internal pressure of the battery cell for the emissions toflow out, thereby ensuring that the pressure relief mechanism 213 can beactuated and normally achieve its designed function. In addition, theuse of the isolation component 14 may also accelerate the coating speedand accuracy of the adhesive without worrying about coating the adhesiveto a region related to the actuation of the pressure relief mechanism213, and save costs of production time.

FIG. 9 shows a perspective view of an isolation component 14 accordingto some embodiments of the present application, FIG. 10 shows anexploded view in which the isolation component 14 shown in FIG. 9 and athermal management component 13 as an example of an attachment componentare not assembled together, and FIG. 11 shows a perspective view inwhich the isolation component 14 shown in FIG. 9 and a thermalmanagement component 13 are attached together. According to embodimentsshown in FIGS. 9-11 , an isolation component 14 may be attached to anattachment component such as a thermal management component 13 beforecoating the adhesive, so that a special structural feature on theisolation component 14 at least corresponds to a pressure reliefmechanism 213 or an avoidance structure 134 disposed on the attachmentcomponent, where the avoidance structure 134 can provide a spaceallowing the relief mechanism 213 to be actuated. The specific structureand features of the avoidance structure 134 involved will be describedin detail below.

As shown in FIGS. 9-11 , according to some preferred embodiments of thepresent application, the isolation component 14 may include a main body141 and a plurality of protrusions 142. The main body 141 is adapted tobe attached or assembled to an attachment component such as a thermalmanagement component 13. The protrusion 142 protrudes outward from asurface of the main body 141, and the protrusion 142 is arranged to bealigned with the pressure relief mechanism 213 or a relief region of thepressure relief mechanism 213 or an avoidance structure 134 or anavoidance chamber 134 a in some embodiments described below in aprotruding direction when the main body 141 is attached to theattachment component. Although in the examples shown in FIGS. 10-11 ,the protrusion 142 is arranged to be aligned with the avoidancestructure 134, in conjunction with FIG. 8 it is easy to understand thatthe arrangement of the avoidance structure 134 itself corresponds to thepressure relief mechanism 213 or both of which are aligned with eachother, so the protrusion 142 may also be considered to be aligned withthe pressure relief mechanism 213 or its actuation region (or reliefregion). Alternatively, in other embodiments not shown, for example, inan example where the battery 10 is not provided with the avoidancestructure 134, the protrusion 142 may also be arranged to be directlyaligned with the pressure relief mechanism 213 or aligned with itsactuation region or relief region.

It can be understood that the main body 141 and the protrusion 142included in the isolation component 14 described here are not intendedto indicate that the isolation component 14 must include independentcomponents, and according to the following description of some preferredembodiments, it can be seen that a structure that the main body 141 andthe protrusion 142 integrally form may be more advantageous in manyaspects.

In the present application, the main body 141 may be understood as aportion of the isolation component 14 designed to be easily attached toan attachment component such as a support component or a thermalmanagement component 13, the protrusion 142 is designed to protrude fromthe surface of the main body 141, and an outer peripheral dimension ofthe protrusion 142 is greater than or equal to an outer peripheraldimension of the pressure relief mechanism 213 or at least greater thanor equal to that of the relief region of the pressure relief mechanism213. In this way, when coating the adhesive, on the one hand, a gluingmachine may be guided to perform a gluing operation according to apredetermined path, and on the other hand, the adhesive may be ensurednot to be coated to a position where the pressure relief mechanism 213is located, thus ensuring that the adhesive can be coated to a properposition efficiently and accurately.

Although in the embodiments shown in FIGS. 9-11 , the isolationcomponent 14 is designed to have a long and thin sheet-shaped main body141, and each main body 141 is provided with a row of protrusions 142.It can be understood that the main body 141 and the protrusion 142 inthe present application may have various shapes according to the shape,structure and other factors of the pressure relief mechanism 213. Inconsideration of the weight energy density or volume energy density ofthe battery, the main body 141 generally has a relatively thinthickness, and therefore the main body 141 may generally be thin filmsor sheets in various shapes. Typically, a wall thickness of theisolation component 14 or the main body 141 may be between 0.01 mm and0.05 mm A shape of the protrusion 142 may be, for example, oblong,circular, elliptical, square, or the like as shown in the drawings.Moreover, a single main body 141 may also be designed to have a singleprotrusion 142, multiple rows of protrusions 142, or a plurality ofprotrusions 142 arranged in other manners, as long as the arrangementand relative position of the protrusion 142 on the surface of the mainbody 141 can adapt to the setting position of the pressure reliefmechanism 213 of the battery cell 20 in the battery.

According to some preferred embodiments, a single isolation component 14may be designed to include one main body 141 and a plurality ofprotrusions 142 protruding from a surface of the main body 141, the mainbody 141 is integrally attached to the attachment component of thebattery, and in such an attachment case, the plurality of protrusions142 are respectively aligned with pressure relief mechanisms 213 (oraligned with relief regions of the pressure relief mechanisms 213) of aplurality of battery cells 20 included in the battery 10 in one-to-onecorrespondence, so that each protrusion 142 can surround a pressurerelief mechanism 213 (or at least surround a relief region of the reliefmechanism 213) with which it is aligned. Therefore, a process ofassembling the isolation component 14 to the attachment component of thebattery is relatively simple, and meanwhile, the adhesive coated or tobe coated can be isolated from the pressure relief mechanisms 213 or therelief regions thereof of the plurality of battery cells 20 included inthe battery in a relatively independent manner by using the plurality ofprotrusions 142. Moreover, this can also assist an operator to properlycomplete the coating of the adhesive with higher efficiency when coatingthe adhesive, so that the operator does not need to carefully coat theadhesive, which helps to reduce assembling costs and production costs ofthe battery 10.

Based on the foregoing solution, since a single isolation component 14may be designed to have a plurality of protrusions 142, this design isparticularly advantageous for a typical battery type in which aplurality of battery cells 20 are accommodated in one battery 10 and aplurality of battery cells 20 therein are respectively provided withpressure relief mechanisms 213, because when the single isolationcomponent 14 is assembled in place, the plurality of protrusions 142 canplay a role in isolating the adhesive for the pressure relief mechanisms213 of the plurality of battery cells 20.

In a battery 10 including a plurality of battery cells 20, the batterycells 20 may generally be attached to the attachment component of thebattery 10 in rows. In view of this situation, the isolation component14 including one main body 141 and a plurality of protrusions 142protruding from a surface of the main body 141 as described above may beadopted. The isolation component 14 may be an integrally formed sheet,and when the main body 141 of the isolation component 14 is attached tothe attachment component of the battery 10, the plurality of protrusions142 on the isolation component 14 may be respectively aligned withpressure relief mechanisms 213 of the plurality of battery cells 20included in the battery in one-to-one correspondence. Alternatively, aplurality of isolation components 14 for the plurality of battery cells20 may be integrally formed, where positions of the plurality ofisolation components 14 arranged in rows respectively correspond topositions of the pressure relief mechanisms 213 of the plurality ofbattery cells 20. In this way, an assembling process of assembling aplurality of battery cells 20 to the battery 10 is simpler and theassembling efficiency is higher.

According to some embodiments of the present application, as shown inFIGS. 8, 10 and 12-13 mentioned above, an avoidance structure 134 may bedisposed on an attachment component such as a thermal managementcomponent 13, and an avoidance chamber 134 a is formed between theavoidance structure 134 and the pressure relief mechanism 213, therebyproviding a space allowing the pressure relief mechanism 213 to beactuated. In these embodiments, arrangements of the isolation component14 and the protrusions 142 therein correspond to the arrangement of theavoidance structure 134 or the avoidance chamber 134 or both of whichare aligned.

Specifically, the avoidance chamber 134 a may be, for example, a closedcavity formed by joint enclosing of the avoidance structure 134 and thepressure relief mechanism 213. In this solution, for the discharge ofthe emissions from the battery cells 20, an inlet side surface of theavoidance chamber 134 a may be opened due to the actuation of thepressure relief mechanism 213, while an outlet side surface opposite tothe inlet side surface may be partially damaged and opened due to thehigh-temperature and high-pressure emissions, thus forming a reliefchannel for the emissions. According to some other embodiments, theavoidance chamber 134 a may be, for example, a non-closed cavity formedby joint enclosing of the avoidance structure 134 and the pressurerelief mechanism 213, and an outlet side surface of the non-closedcavity may originally have a channel for the emissions flowing out. Asindicated by the arrows in the avoidance chamber 134 a of FIG. 8 , theemissions will be discharged outward in a fan-shaped direction.

According to some embodiments, as shown in FIGS. 12-14 , the thermalmanagement component 13 further includes an avoidance bottom wall 134 bat a bottom of the avoidance chamber 134 and an avoidance side wall 134c surrounding the avoidance chamber 134 a. The avoidance bottom wall 134b referred to herein refers to a wall of the avoidance chamber 134 aopposite to the pressure relief mechanism 213, and the avoidance sidewall 134 c is a wall adjacent to the avoidance bottom wall 134 b andsurrounding the avoidance chamber 134 a at a certain angle, where anincluded angle formed by the avoidance side wall 134 c and the avoidancebottom wall 134 b may preferably be in a range of 105°-175°. The thermalmanagement component 13 may also be provided with a fluid channel 133for accommodating a fluid, and the fluid may be a cooling medium, so asto lower the temperature of the battery cell 20.

Accordingly, in these embodiments, the plurality of protrusions 142 ofthe isolation component 14 may be arranged as shown in FIGS. 10-11 ,where each protrusion 142 may respectively surround its alignedavoidance chamber 134 a, that is, the protrusion 142 is substantivelycovered and disposed at or beyond an upper peripheral edge of anavoidance side wall 134 c of a corresponding avoidance chamber 134 a.That is, the protrusion 142 of the isolation component 14 issubstantively covered and disposed on an upper peripheral edge of thecorresponding avoidance chamber 134 a, thereby isolating the adhesivecoated or to be coated from the avoidance structure 134 or the avoidancechamber 134 a.

The thermal management component 13 and the isolation component 14according to the foregoing preferred embodiments are very beneficial toimproving the assembling efficiency of the battery. A process ofassembling the isolation component 14 to the attachment component of thebattery is relatively simple, and meanwhile, the adhesive coated or tobe coated can be isolated from avoidance chambers 134 a corresponding tothe pressure relief mechanisms 213 of the plurality of the battery cells20 included in the battery in a relatively independent manner by usingthe plurality of protrusions 142. Thus, the coated adhesive may beprevented from influencing the pressure relief mechanism 213 of thebattery cell 20 to perform its designed function, thereby ensuring thesafety use of the battery. Moreover, this can also assist an operator toproperly complete the coating of adhesive with higher efficiency whencoating the adhesive.

For example, in the embodiments shown in FIGS. 10-11 , when a singlelong and thin sheet-shaped main body 141 is assembled to the thermalmanagement component 13 and is assembled in place, eight protrusions 142on the main body 141 are respectively covered and disposed on thealigned eight avoidance structures 134 or avoidance chambers 134 a, sothat the adhesive cannot enter the avoidance chambers 134 a. In otherwords, an isolation operation of pressure relief mechanisms 213 of eightor more battery cells 20 may be achieved by assembling a singleisolation component 14 at one time.

It should be understood that the arrangement direction and position ofthe pressure relief mechanism 213 in the battery cell 20 are not limitedin the present application. In fact, no matter whether the pressurerelief mechanism 213 is arranged at a lower portion, upper portion orside portion of the battery cell 20, the relevant design of theisolation component 14 proposed in the present application may beproperly applied, and it plays a beneficial role in ensuring that thepressure relief mechanism 213 achieves its designed function to relievethe high-temperature and high-pressure emissions in the battery cellwhen necessary, thus ensuring the safety use of the battery.

In some embodiments, as shown in FIGS. 12-14 , the thermal managementcomponent 13 may be designed to have the following specificconfiguration. The thermal management component 13 may include a firstthermally conductive plate 131 and a second thermally conductive plate132. A groove structure corresponding to a fluid channel is formed onthe second thermally conductive plate 132, and an avoidance structure134 is formed on the first thermally conductive plate 131. By assemblingthe first thermally conductive plate 131 and the second thermallyconductive plate 132 together, for example, the first thermallyconductive plate 131 and the second thermally conductive plate 132 maybe assembled together by welding (such as brazing), the thermalmanagement component 13 as described in the foregoing embodiments may beformed. Certainly, it can be understood that this manner of forming thethermal management component 13 by assembling the first thermallyconductive plate 131 and the second thermally conductive plate 132 isonly an example, and the foregoing thermal management component 13 mayalso be formed in other appropriate manners.

The flow channel 133 disposed in the thermal management component 13 maybe arranged to at least partially surround the avoidance chamber 134,that is, the avoidance side wall 134 c separates the flow channel 133from the avoidance chamber 134 a, and a weakened structure which is easyto be damaged by the high-temperature and high-pressure emissions forexample may be disposed on the avoidance side wall 134 c. It should beunderstood that the weakened structure referred to in the presentapplication may include, but is not limited to, a portion with reducedthickness, an indentation (e.g., a cross-shaped indentation 134 d asshown in FIGS. 10 and 12 ), a fragile portion made of a fragilematerial, or a fragile portion made of a material with a lower meltingpoint, or the like.

In this way, when the emissions from the battery cell 20 enter theavoidance chamber 134 a, the weakened structure on the avoidance sidewall 134 c is damaged, so that the cooling medium such as cooling liquidin the flow channel 133 flows out into the avoidance chamber 134 a, andthen the cooling liquid is in contact with the high-temperature andhigh-pressure emissions from the battery cell 20, and absorbs a largeamount of heat and is vaporized. In this way, the temperature andintensity of pressure of the high-temperature and high-pressureemissions from the battery cell 20 are significantly reduced in a shorttime, thus protecting other components such as the battery cells 20 inthe battery 10 in which thermally runaway does not occur. Moreover,since the plurality of protrusions 142 of the isolation component 14 aresubstantively covered and disposed at or beyond the upper peripheraledge of the avoidance side wall 134 c of the corresponding avoidancechamber 134 a, this design can make the emissions damage the weakenedstructure of the avoidance side wall 134 c and introduce the coolingmedium, and meanwhile, the isolation component 14 and the protrusions142 thereof still play a certain role in preventing the adhesive such asthermally conductive silica gel located outside thereof, thus improvingthe safety of the battery.

The overall construction or configuration of the isolation component 14is introduced above with reference to FIG. 9 to FIG. 14 , based mainlyon the relative positional relationship between the isolation component14 and another component, such as the attachment component or thepressure relief mechanism 213. Based on this, the isolation component 14may be designed into various possible constructions to achieve thefunction described above, that is, the adhesive used when the batterycell 20 is assembled to the attachment component is isolated from aspace between the attachment component and the pressure relief mechanism213, or the coated adhesive is isolated from a space that may affect thepressure relief mechanism 213 to perform its designed function ofpressure relief once the adhesive flows in. More specific constructionsof the isolation component 14 will be mainly described in detail belowwith reference to FIG. 15 to FIG. 32 .

FIG. 15 shows a perspective view of an isolation component 14 accordingto some embodiments of the present application, FIG. 16 shows anenlarged view of a part C of the insolation component 14 shown in FIG.15 , FIG. 17 shows a sectional view of the insolation component 14 shownin FIG. 15 in a direction of D-D, and FIG. 18 shows an enlarged view ofa part E of a sectional plane of the insolation component 14 shown inFIG. 17 . According to embodiments shown in FIG. 15 to FIG. 18 , withthe special design of the protrusion 142, the isolation component 14 canmore effectively prevent an adhesive such as thermally conductive silicagel to isolate it from a space between the attachment component and thepressure relief mechanism 213, so as to ensure that the pressure reliefmechanism 213 can be actuated and normally achieve its designedfunction.

As shown in FIG. 15 to FIG. 18 , according to some embodiments of thepresent application, the protrusion 142 disposed on the isolationcomponent 14 includes a first protrusion 1421 and a second protrusion1422, where the first protrusion 1421 and the second protrusion 1422protrude from a surface of the main body 141 in the same direction. Whenassembled in place, the isolation component 14 is disposed between thebattery cell 20 and the attachment component. Therefore, specifically,in a case of attaching the main body 141 of the isolation component 14to the attachment component, the first protrusion 1421 and the secondprotrusion 1422 are arranged to protrude from the surface of the mainbody 141 in a direction away from the attachment component, that is, toprotrude toward the battery cell 20.

The first protrusion 1421 corresponds to the position of the pressurerelief mechanism 213. Specifically, as described above, the firstprotrusion 1421 may be arranged to be aligned with the pressure reliefmechanism 213 or an actuation region (or a relief region) of thepressure relief mechanism 213 or the avoidance structure 134 or theavoidance chamber 134 a in the embodiments described above in aprotruding direction when the main body 141 is attached to theattachment component. A protruding height of the first protrusion 1421is beneficial to preventing the adhesive from entering a space betweenthe pressure relief mechanism 213 and the attachment component when theadhesive is applied, so as to avoid the inflow adhesive to hinder thenormal operation of the pressure relief mechanism 213.

The second protrusion 1422 and the first protrusion 1421 are spacedapart. With reference to FIG. 16 , the second protrusion 1422 isarranged to surround the first protrusion 1421. Specifically, the secondprotrusion 1422 is in an annular structure, and is arranged to surroundan outer periphery of the first protrusion 1421. A protruding height ofthe second protrusion 1422 is also beneficial to preventing the adhesivefrom entering the space between the pressure relief mechanism 213 andthe attachment component around the first protrusion 1421. Moreover,since the second protrusion 1422 is arranged around the first protrusionthe cooperation of the two in structure has a multiple prevention effecton the adhesive, and thus can intercept the adhesive more effectivelyand reliably, to preventing the adhesive from entering between theattachment component and the pressure relief mechanism 213, hinderingnormal actuation of the pressure relief mechanism 213 when the internalpressure or temperature of the battery cell 20 reaches a threshold, andpreventing the adhesive from flowing in to block the relief channel, toblock discharge of the emissions relieved from the battery cell, so asto further improve safety performance of the battery 10.

In some embodiments, with reference to FIG. 16 and FIG. 18 , a groove143 is formed between the first protrusion 1421 and the secondprotrusion 1422. The groove 143 may accommodate at least part of theadhesive to prevent the adhesive coated or to be coated from beingapplied between the attachment component and the pressure reliefmechanism 213. The groove 143 may specifically accommodate part of theadhesive that overflows the second protrusion 1422, the adhesive thataccidentally drips in the groove 143 in the process of attaching thebattery cell 20 to the attachment component, the adhesive that entersthe groove 143 due to other reasons, and the like.

The groove 143 between the first protrusion 1421 and the secondprotrusion 1422 may accommodate at least part of the adhesive, which isequivalent to adding another barrier for the adhesive. When the secondprotrusion 1422 prevents its peripheral adhesive from flowing to thefirst protrusion 1421, if the function of intercepting the adhesive bythe second protrusion 1422 fails, the groove 143 may further store acertain amount of adhesive overflowing from the second protrusion 1422,thereby preventing the adhesive from further flowing to the spacebetween the pressure relief mechanism 213 and the attachment component.

In order to enable the isolation component 14 to achieve a betteradhesive preventing effect, the structure of the first protrusion 1421,the second protrusion 1422 or the groove 143 may be designedaccordingly.

In some embodiments, with reference to FIG. 18 , the second protrusion1422 includes a first side wall 1422 a, a second side wall 1422 b and aconnecting wall 1422 c for connecting the first side wall 1422 a and thesecond side wall 1422 b. In the embodiments of the present application,the first side wall 1422 a is connected to the main body 141, the secondside wall 1422 b is connected to the main body 141, and the first sidewall 1422 a is arranged to opposite to the second side wall 1422 b. Thefirst side wall 1422 a is close to the first protrusion 1421, and thefirst side wall 1422 a is a wall shared by the second protrusion 1422and the groove 143.

In some embodiments, as shown in FIG. 18 , the first side wall 1422 aand the second side wall 1422 b are parallel to a direction in which theattachment component faces the battery cell 20 when the battery cell 20is attached to the attachment component, that is, the first side wall1422 a and the second side wall 1422 b are parallel to a protrudingdirection of the second protrusion 1422. The connecting wall 1422 c isperpendicular to the protruding direction of the second protrusion 1422.The isolation component 14 in this structure has a good effect ofpreventing the adhesive, it is simpler to process required modules, theprocessing is easy, and the costs are low.

In some embodiments, with reference to FIG. 19 , at least one of thefirst side wall 1422 a and the second side wall 1422 b includes a firstprojection 1401, and the first projection 1401 is arranged to protrudein a first direction X, where the first direction X is perpendicular toa protruding direction of the second protrusion 1422.

Here, the first direction X is a direction that is located in a D-Dsectional plane shown in FIG. 17 and is perpendicular to the protrudingdirection of the second protrusion 1422. Therefore, the first directionX in the embodiments of the present application should be understood asa direction perpendicular to the protruding direction of the secondprotrusion 1422, such as a direction indicated by an arrow in FIG. 19 .

Exemplarily, in an example that the first side wall 1422 a is providedwith a first projection 1401, the actual protruding direction of thesecond protrusion 1422 is a direction in which the attachment componentfaces the battery cell 20. For convenience of understanding anddescription, in an example that a direction of the second protrusion1422 upward along a paper surface is the protruding direction, the firstdirection X is a direction perpendicular to the protruding direction ofthe second protrusion 1422, toward the right along the paper surface forexample. Therefore, the first projection 1401 may protrude in the firstdirection X indicated by the arrow.

In the embodiments of the present application, since the groove 143 andthe second protrusion 1422 share the first side wall 1422 a, and thefirst projection 1401 is disposed on the first side wall 1422 a andprotrudes in a direction close to the second side wall 1422 b, in thisway, while the second protrusion 1422 meets a requirement of preventingthe adhesive, the first projection 1401 may further increase anaccommodating volume of the groove 143, thereby accommodating moreadhesive and preventing the adhesive from entering the space between theattach component and the pressure relief mechanism 213.

It should be understood that the first projection 1401 disposed on thefirst side wall 1422 a may further protrude in a direction opposite tothe direction indicated by the arrow in FIG. 19 , or the firstprojection 1401 may be further disposed on the second side wall 1422 b,and the first projection 1401 on the second side wall 1422 b mayprotrude in a direction perpendicular to the protruding direction of thesecond protrusion 1422, for example, protrude in a direction close to oraway from the first side wall 1422 a, which is not limited in theembodiments of the present application.

In practical applications, the first projection 1401 may be disposed onthe first side wall 1422 a and/or the second side wall 1422 b accordingto requirements, so as to achieve one or more of effects of effectivelypreventing the adhesive, increasing the accommodating volume of thegroove 1443, reducing the space occupied by the second protrusion 1422,facilitating demoulding of the isolation component 14 in a producingprocess, and the like.

In the embodiments of the present application, the first projection 1401is formed from at least part of the first side wall 1422 a or the secondside wall 1422 b.

In some embodiments, with reference to FIG. 20 , at least one of thefirst side wall 1422 a and the second side wall 1422 b is arrangedobliquely relative to a direction in which the attachment componentfaces the battery cell 20.

Exemplarily, in an example that the first side wall 1422 a and thesecond side wall 1422 b are both arranged obliquely, as shown in FIG. 20, one end of the first side wall 1422 a connected to the connecting wall1422 c is oblique to a side on which the second side wall 1422 b islocated, and one end of the second side wall 1422 b connected to theconnecting wall 1422 c is oblique to a side on which the first side wall1422 a is located. The oblique arrangement of the first side wall 1422 amay increase the accommodating volume of the groove 143 to accommodatemore adhesive, thereby effectively preventing the adhesive from enteringbetween the pressure relief mechanism 213 and the attachment component.The oblique arrangement of the second side wall 1422 b may increase acoating area of the adhesive on a periphery of the second protrusion1422 to ensure reliability of adhesion. In addition, the obliquearrangements of the first side wall 1422 a and/or the second side wall1422 b facilitate demoulding of the insolation component 14 in aproducing process.

It should be understood that, in other embodiments, the directions ofthe oblique arrangements of the first sidewall 1422 a and/or the secondside wall 1422 b may also be in other forms. For example, one end of thefirst side wall 1422 a connected to the connecting wall 1422 c isoblique to a side on which the first protrusion is located, and/or oneend of the second side wall 1422 b connected to the connecting wall 1422c is oblique to a side away from the first side wall 1422 a, which isnot limited in the embodiments of the present application.

It can be understood that, in practical applications, the firstprojection 1401 may be disposed on the first side wall 1422 a and/or thesecond side wall 1422 b while the first side wall 1422 a and/or thesecond side wall 1422 b are obliquely arranged, which is not limited inthe embodiments of the present application.

It should be noted that when whether the first side wall 1422 a or thesecond side wall 1422 b is arranged obliquely relative to a direction inwhich the attachment component faces the battery cell 20 is determined,it can be determined according to a spatial relationship between a mainplane where the first side wall 1422 a or the second side wall 1422 b islocated and the direction in which the attachment component faces thebattery cell 20. In an example of a main plane of the first side wall1422 a, it may be a plane where the first side wall 1422 a is located,or a plane where most of the first side wall 1422 a is located, or aplane where a flat part on the first side wall 1422 a is located, or thelike.

In some embodiments, with reference to FIG. 21 , the connecting wall1422 c includes a second projection 1402, the second projection 1402 isarranged to protrude in a direction in which the attachment componentfaces the battery cell 20, or arranged to protrude in a direction inwhich the battery cell 20 faces the attachment component. Since theprotruding direction of the second protrusion 1422 is the direction inwhich the attachment component faces the battery cell 20, the secondprojection 1402 may also be understood as being arranged to protrude inthe protruding direction of the second protrusion 1422, or beingarranged to protrude in a direction opposite to the protruding directionof the second protrusion 1422.

Exemplarily, as shown in FIG. 21 , the second projection 1402 isarranged to protrude in a direction in which the battery cell 20 facesthe attachment component. The arrangement of the second projection 1402makes a surface of the connecting wall 1422 c uneven, thereby forming aspace that can accommodate the adhesive. In this way, when a height ofthe adhesive exceeds a height of the second protrusion 1422 to have atendency of flowing to the first protrusion 1421, the adhesive may firstremain in the accommodating space on the surface of the connecting wall1422 c, which is equivalent to adding another barrier, and preventingthe adhesive from flowing in a direction of the first protrusion 1421continuously. If a width of the second protrusion 1422 is sufficient,curvature of the surface of the connecting wall 1422 c is smaller, andthe adhesive that the connecting wall 1422 c can store is more.

In the embodiments of the present application, the second projection1402 is formed from at least part of the connecting wall 1422 c.

It should be understood that the second projection 1402 may also bearranged to protrude in a direction toward the battery cell 20, which isnot limited in the embodiments of the present application. By rationallydesigning the structure of the second projection 1402, the spaceoccupied by the second protrusion 1422 can be reduced, the accommodatingvolume of the groove 143 can be increased, and the like.

It should also be understood that, in practical applications, while thesecond projection 1402 is disposed on the connecting wall 1422 c, thefirst projection 1401 may be disposed on at least one of the first sidewall 1422 a and the second side wall 1422 b, and/or at least one of thefirst side wall 1422 a and the second side wall 1422 b is obliquelyarranged, which is not limited in the embodiments of the presentapplication.

In some embodiments, with reference to FIG. 22 , the second protrusion1422 includes a cavity 1404. At least one of the first side wall 1422 a,the second side wall 1422 b and the connecting wall 1422 c is providedwith an opening 1405. The opening 1405 is in communication with thecavity 1404, so that at least part of the adhesive enters the cavity1404 through the opening 1405.

In the embodiments of the present application, by providing the opening1405 on at least one wall of the second protrusion 1422, the adhesivelocated around the second protrusion 1422 can enter the cavity 1404through the opening 1405, which not only makes full use of the spaceoccupied by the second protrusion 1422, but also may reduce the adhesivearound the second protrusion 1422 to prevent the adhesive from enteringthe space between the attachment component and the pressure reliefmechanism 213.

In the solution of disposing the opening 1405 on at least one wall ofthe second protrusion 1422, a shape of the second protrusion 1422 may bein any one of the structures as shown in the foregoing FIGS. 18-21 orthe following drawings, and the embodiments of the present applicationdo not limit the shape of the second protrusion 1422.

In some embodiments, the cavity 1404 may be a semi-enclosing structure.with reference to FIG. 22 , the cavity 1404 may be enclosed by walls ofthe second protrusion 1422, the walls of the second protrusion 1422 arelocated on a side of the isolation component 14 close to the batterycell 20, and the cavity 1404 is in communication with the outside on aside of the isolation component 14 close to the attachment component, toform a semi-closed chamber. In a case that the isolation component 14 isattached to the attachment component, an opening of the cavity 1404 incommunication with the outside may be blocked by the attachmentcomponent.

In some embodiments, the cavity 1404 may be a fully enclosing structure.With reference to FIG. 23 , the cavity 1404 may be enclosed by walls ofthe second protrusion 1422 and the main body 141. Exemplarily, thesecond protrusion 1422 may be an independent component connected to themain body 141.

It should be understood that, in order to smoothly enter the cavity 1404from the opening 1405 for the adhesive, the opening 1405 can be openedas large as possible to prevent the adhesive from having excessiveresistance or directly blocking the opening 1405 when entering thecavity. In practical applications, a size of the opening 1405 may becorrespondingly designed according to the structure of the secondprotrusion 1422, a coating thickness of the adhesive, and characteristicparameters of the adhesive, such as bonding strength, viscosity, and geltime.

The structure of the second protrusion 1422 of the isolation component14 is introduced above in detail, and the first protrusion 1421 of theisolation component 14 will be described below in detail with referenceto the drawings. It should be understood that the structures of thefirst protrusion 1421 and the second protrusion 1422 are respectivelydescribed in an example of the same drawing in the embodiments of thepresent application, but this does not limit the isolation component 14to be formed by combining the first protrusion 1421 and the secondprotrusion 1422 shown in the drawings.

In some embodiments, with reference to FIG. 23 , the first protrusion1421 may include a third side wall 1421 a and a top wall 1421 b. Thethird side wall 1421 a is connected to the main body 141, and the thirdside wall 1421 a is arranged opposite to the first side wall 1422 a,where the third side wall 1421 a is a wall shared by the firstprotrusion 1421 and the groove 143. The top wall 1421 b is connected toone end of the third side wall 1421 a close to the battery cell 20. Aplane where the top wall 1421 b is located is perpendicular orsubstantially perpendicular to a protruding direction of the firstprotrusion 1421.

In some embodiments, the third side wall 1421 a is parallel to adirection in which the attachment component faces the battery cell 20when the battery cell 20 is attached to the attachment component, thatis, the third side wall 1421 a is parallel to the protruding directionof the first protrusion 1421 (that is, the protruding direction of thesecond protrusion 1422). The isolation component 14 in this structurehas a good effect of preventing the adhesive, it is simpler to processrequired modules, the processing is easy, and the costs are low.

In some embodiments, with reference to FIG. 24 , the third side wall1421 a may include a third projection 1403, and the third projection1403 is arranged to protrude in a first direction X, where the firstdirection X is perpendicular to a protruding direction of the firstprotrusion 1421. In the embodiments of the present application, theprotruding direction of the first protrusion 1421 is the same as theprotruding direction of the second protrusion 1422, and thus the firstdirection X here is also perpendicular to the protruding direction ofthe second protrusion 1422.

Exemplarily, as shown in FIG. 24 , a third projection 1403 is disposedon the third side wall 1421 a, where the third projection 1403 isarranged to protrude in the first direction X indicated by an arrow. Thethird side wall 1421 a is a wall shared by the first protrusion 1421 andthe groove 143, the third projection 1403 is disposed on the third sidewall 1421 a and protrudes in a direction away from the first side wall1422 a, which may increase the accommodating volume of the groove 143,thereby accommodating more adhesive. It should be understood that thethird projection 1403 may also be arranged to protrude in a directionopposite to the direction indicated by the arrow in FIG. 24 , which isnot limited in the embodiments of the present application.

In some embodiments, with reference to FIG. 25 , the third side wall1421 a is arranged obliquely relative to a direction in which theattachment component faces the battery cell 20. Exemplarily, one end ofthe third side wall 1421 a connected to the top wall 1421 b is obliqueto a direction away from the second protrusion 1422, which may increasethe accommodating volume of the groove 143 to accommodate more adhesive,thereby effectively preventing the adhesive from entering between thepressure relief mechanism 213 and the attachment component. Moreover,the way to obliquely arranging the third side wall 1421 a is beneficialto demoulding of the isolation component 14 in a producing process.

It should be understood that, in some other embodiments, the directionof the oblique arrangement of the third sidewall 1421 a may also be inother forms. For example, one end of the third side wall 1421 aconnected to the top wall 1421 b is oblique to a side on which thesecond protrusion 1422 is located, which is not limited in theembodiments of the present application. In addition, a third projection1403 may be disposed on the third side wall 1421 a while the third sidewall 1421 is obliquely arranged. In practical applications, thestructures of the first protrusion 1421 shown in FIG. 23 to FIG. 25 anddescribed in the related description may be combined with the structuresof the second protrusion 1422 shown in FIG. 18 to FIG. 23 and describedin the related description arbitrarily, which is not limited in theembodiments of the present application thereto.

Similarly, in some embodiments, an opening may also be disposed on thethird side wall 1421 a, so that the adhesive in the groove 143 passesthrough the isolation component 14 through the opening, and entersbetween the isolation component 14 and the attachment component.

In the embodiments of the present application, the groove 143 is formedfrom the third side wall 1421 a of the first protrusion 1421, the firstside wall 1422 a of the second protrusion 1422, and the main body 141.Therefore, by properly designing the structures of the first side wall1422 a, the third side wall 1421 a and the main body 141, the groove 143in a specific structure can be realized to achieve the purpose ofincreasing the volume of the groove 143 for accommodating the adhesive.

In some embodiments, a width of the second protrusion 1422 may be 1 mmto 8 mm.

It should be noted that the width of the second protrusion 1422 involvedhere can be understood as a range of the width of the second protrusion1422. For the second protrusion 1422 with equal width, the width isuniform, and the uniform width should be greater than 1 mm and less than8 mm. For the second protrusion 1422 with unequal width, the maximumwidth and the minimum width should be in a range from 1 mm to 8 mm.

It should also be noted that the width of the second protrusion 1422refers to a width of the second protrusion in the first direction X, andthe first direction X is perpendicular to the protruding direction ofthe second protrusion 1422.

Exemplarily, a sectional shape of the second protrusion 1422 is any oneof the following shapes: a Ω shape, a convex lens type, a concave lenstype, a trapezoid shape, an arch shape, and the like.

In some embodiments, a width of the groove 143 is 1 mm to 8 mm. Themeaning of the width of the groove 143 is similar to the meaning of thewidth of the second protrusion 1422, which will not be repeatedredundantly herein.

Exemplarily, a sectional shape of the groove 143 is any one of thefollowing shapes: a drum type, a bag type, a bowl type, a trapezoidshape, a rectangle shape, and the like.

In some embodiments, the first protrusion 1421 and the second protrusion1422 may be formed on the surface of the main body 141 by a blisterprocess. For example, the first protrusion 1421 and the secondprotrusion 1422 are processed and formed on a piece of thin sheet orfilm made of a thermoplastic material by a blister process on the basisof the piece of thin sheet or film, so as to produce the isolationcomponent 14. This helps to simplify a manufacturing process of theisolation component 14 and reduce the costs.

In some embodiments, the first protrusion 1421 and/or the secondprotrusion 1422 may be independent components connected to the main body141. For example, the first protrusion 1421 and/or the second protrusion1422 are attached to the main body 141 after being produced, so as toproduce the isolation component 14. This helps to reduce the costs ofmolds when a more complicated first protrusion 1421 and/or secondprotrusion 1422 are produced.

In some embodiments, as shown in FIG. 26 , the second protrusion 1422may be an elastic component attached to the surface of the main body141. The elastic component has a certain elastic deformation ability,and serves as the second protrusion 1422 to prevent the adhesive, whichcan adapt to larger installation errors. The elastic component may be,for example, a rubber pad, a silicone pad, foam, or the like.

In some embodiments, if the elastic component adopts a loose structure,a loose hole inside the elastic component may be used to accommodatepart of the adhesive. Certainly, if the structure of the elasticcomponent is relatively compact, a channel may be disposed on theelastic component, and part of the adhesive is accommodated using thechannel. It can be understood that, even if the second protrusion 1422is made of a non-elastic component, a channel for accommodating theadhesive may also be disposed in the second protrusion 1422, which isnot limited in the embodiments of the present application.

It should be noted that, no matter whether the second protrusion 1422 ismade of an elastic component or another material, the structural designsrelated to the second protrusion 1422 described in FIG. 15 to FIG. 25are also applicable to this.

In some embodiments, a height of the first protrusion 1421 is greaterthan or equal to a predetermined application height of the adhesive, andthe first protrusion 1421 is configured to be compressed when thebattery cell 20 is attached to the attachment component, to have aheight consistent with that of the adhesive; and/or a height of thesecond protrusion 1422 is greater than or equal to a predeterminedapplication height of the adhesive, and the second protrusion 1422 isconfigured to be compressed when the battery cell 20 is attached to theattachment component, to have a height consistent with that of theadhesive.

This arrangement ensures that the first protrusion 1421 and the secondprotrusion 1422 can effectively prevent the adhesive from being appliedbetween the attachment component and the pressure relief mechanism 213.Meanwhile, this enables the isolation component 14 not to affectreliable adhesion between the attachment component and the pressurerelief mechanism 213, and actuation of the pressure relief mechanism213. Moreover, when the battery cell 20 and the attachment component ofthe battery 10 are glued and pressed or engaged by the adhesive coatedon adhesive surfaces, the first protrusion 1421 and the secondprotrusion 1422 may be compressed to a height consistent with that ofthe adhesive, so that no gap is left between adhesive surfaces of thebattery cell 20 and the attachment component of the battery 10 by thefirst protrusion 1421 and the second protrusion 1422, thus reliablyensuring that the adhesive is isolated from a region where the pressurerelief mechanism 213 is actuated and where a channel for the emissionsis formed.

In some embodiments, a height of the second protrusion 1422 is equal toa height of the first protrusion 1421. In this way, no gap is leftbetween adhesive surfaces of the battery cell 20 and the attachmentcomponent of the battery 10 by the first protrusion 1421 and the secondprotrusion 1422, thus reliably ensuring that the adhesive is isolatedfrom a region where the pressure relief mechanism 213 is actuated andwhere a channel for the emissions is formed.

In some embodiments, the protrusion 142 further includes a plurality ofannular protrusions arranged to surround the second protrusion 1422, andthe plurality of annular protrusions surround it in sequence and spacedapart from each other. Exemplarily, with reference to FIG. 27 , theprotrusion 142 further includes a third protrusion 1423, and the thirdprotrusion 1423 is arranged around the second protrusion 1422. Thestructural design of the third protrusion 1423 is similar to that of thesecond protrusion 1422. Reference may be made to the above relateddescription of the second protrusion 1422 for details, which will not berepeated redundantly herein for brevity.

In some embodiments, a groove 144 is formed between the secondprotrusion 1422 and the third protrusion 1423. The groove 144 is formedfrom one side wall (that is, the second side wall 1422 b) of the secondprotrusion 1422, one side wall of the third protrusion 1423 and the mainbody 141. The function of the groove 144 is similar to that of thegroove 143 for accommodating at least part of the adhesive. It should beunderstood that more protrusions may further be arranged on an outerperiphery of the third protrusion 1423, the number of protrusions isgreater, and the effect of preventing the adhesive is better. Inaddition, more grooves may further be disposed between the protrusions,the number of grooves is greater, and the effect of preventing theadhesive is better.

In order to prevent the adhesive from passing over the above protrusion142 (such as the first protrusion 1421, the second protrusion 1422 andthe third protrusion 1423) that prevents the adhesive to enter betweenthe pressure relief mechanism 213 and the isolation component 14 andadhere to the pressure relief mechanism 213 to affect the smooth openingof the pressure relief mechanism 213, on the basis of the structureprovided above, an embodiment of the present application furtherprovides another isolation component 14.

FIG. 28 shows a perspective view of an isolation component 14 accordingto some embodiments of the present application, FIG. 29 shows anenlarged view of a part F of the insolation component 14 shown in FIG.28 , FIG. 30 shows a sectional view of the insolation component 14 shownin FIG. 28 in a direction of G-G, and FIG. 31 shows an enlarged view ofa part H of a sectional plane of the insolation component 14 shown inFIG. 30 . According to embodiments shown in FIG. 25 to FIG. 28 , withthe special design of the protrusion 142, the isolation component 14 canprevent the adhesive from adhering to the pressure relief mechanism 213,so as to ensure that the pressure relief mechanism 213 can be actuatedsmoothly.

As shown in FIG. 28 to FIG. 31 , according to some embodiments of thepresent application, a through hole 1406 is disposed on a wall of theprotrusion 142 facing the pressure relief mechanism 213, and the throughhole 1406 is configured such that emissions from the battery cell 20pass through the isolation component 14 when the pressure reliefmechanism 213 is actuated. In the embodiments of the presentapplication, the protrusion 142 may be the protrusion 142 described inFIG. 9 to FIG. 14 , or the protrusion described in FIG. 15 to FIG. 27 .

Exemplarily, with reference to FIG. 28 to FIG. 31 , description is madehere by an example that the protrusion 142 includes a first protrusion1421 and a second protrusion 1422. The first protrusion 1421 includes athird side wall 1421 a and a top wall 1421 b, where the top wall 1421 bis a wall facing the pressure relief mechanism 213. In the embodimentsof the present application, a through hole 1406 is disposed on a wall ofthe first protrusion 1421 facing the pressure relief mechanism 213, thatis, the top wall 1421 b. The through hole 1406 is configured such thatthe emissions from the battery cell 20 pass through the isolationcomponent 14 when the pressure relief mechanism 213 is actuated.

In the embodiments of the present application, the through hole 1406disposed on the top wall 1421 b of the first protrusion 1421 can notonly provide a space for actuation of the pressure relief mechanism 213,but also form a channel for the emissions. Moreover, the through holecan allow the adhesive to enter the through hole 1406 when theprevention functions of the first protrusion 1421, the groove 143 andthe second protrusion 1422 all fail, to avoid the adhesive to adhere tothe pressure relief mechanism 213 to affect the smooth opening of thepressure relief mechanism 213.

In some embodiments, with reference to FIG. 32 , the first protrusion1421 may include only a third side wall 1421 a, where one end of thethird side wall 1421 a close to the battery cell 20 constitutes an edgeof the through hole 1406.

In some embodiments, the through hole 1406 is arranged around thepressure relief mechanism 213 to prevent the adhesive from enteringbetween the pressure relief mechanism 213 and the attachment component,and avoid the pressure relief mechanism 213 to be adhered and unable tobe actuated normally.

In some embodiments, when the attachment component is provided with anavoidance chamber 134 a, the through hole 1406 is configured tocorrespond to a position of the avoidance chamber 134 a, and the throughhole 1406 surrounds a peripheral edge of a side of the avoidance chamber134 a facing the pressure relief mechanism 213 to avoid the pressurerelief mechanism 213 to be adhered and unable to be actuated normally.

In some embodiments, the through hole 1406 is configured to correspondto a position of an actuation region of the pressure relief mechanism213, and the through hole 1406 is arranged around the actuation regionto prevent the adhesive from entering between the actuation region andthe attachment component, and avoid the pressure relief mechanism 213 tobe adhered and unable to be actuated normally.

In the embodiments of the pressure application, a single isolationcomponent 14 may be designed to include one main body 141 and one ormore protrusions 142 protruding from a surface of the main body 141. Thebattery 10 may include a plurality of battery cells 20, and each of theplurality of battery cells 20 includes the pressure relief mechanism213. Manners of positional correspondence between the protrusion 142 andthe pressure relief mechanism 213 (or the actuation region of thepressure relief mechanism 213, or an avoidance chamber 134 a, or anavoidance structure 134) will be described below in detail withreference FIG. 33 to FIG. 35 . It should be understood that theapproximate position of the pressure relief mechanism 213 isschematically shown with a frame with dashed lines in the drawings,which should not be construed as a limitation on the presentapplication.

In some embodiments, as shown in FIG. 33 , a protrusion 142 may be inone-to-one correspondence to a pressure relief mechanism 213. Theprotrusion 142 here may be any one of the protrusions 142 described inFIG. 9 to FIG. 32 .

In some embodiments, as shown in FIG. 34 , a protrusion 142 maycorrespond to at least two pressure relief mechanisms 213. Theprotrusion 142 here may be any one of the protrusions 142 described inFIG. 9 to FIG. 32 .

In the embodiments of the present application, when the protrusion 142is the protrusion described in FIG. 15 to FIG. 32 , the protrusion 142includes the first protrusion 1421 and the second protrusion 1422. Insome embodiments, the first protrusion 1421 and the second protrusion1422 may be in one-to-one correspondence as shown in FIG. 15 to FIG. 32. In some other embodiments, the second protrusion 1422 may correspondto at least two first protrusions 1421 as shown in FIG. 35 .

In this way, the protrusion 142 is in one-to-one correspondence to thepressure relief mechanism 213 or the protrusion 142 corresponds to atleast two pressure relief mechanisms 213 mentioned above, both of whichare understood as that the first protrusion 1421 is in one-to-onecorrespondence to the pressure relief mechanism 213, or the firstprotrusion 1421 corresponds to at least two pressure relief mechanisms213.

Regarding the correspondence between the second protrusion 1422 and thepressure relief mechanism 213, in some embodiments, as shown in FIG. 33, the second protrusion 1422 is in one-to-one correspondence to thefirst protrusion 1421, and the second protrusion 1422 is in one-to-onecorrespondence to the pressure relief mechanism 213. In someembodiments, as shown in FIG. 34 , the second protrusion 1422 is inone-to-one correspondence to the first protrusion 1421, and the secondprotrusion 1422 corresponds to at least two pressure relief mechanisms213. In some embodiments, as shown in FIG. 35 , the second protrusion1421 corresponds to at least two first protrusions 1421, and the secondprotrusion 1422 corresponds to at least two pressure relief mechanisms213.

When the second protrusion 1422 corresponds to a plurality of firstprotrusions 1421 (or a plurality of pressure relief mechanisms 213), thesecond protrusion 1422 is configured to prevent the adhesive for theplurality of first protrusions 1421. In this way, when coating theadhesive, on the one hand, a gluing machine may be guided to perform agluing operation according to a predetermined path, and on the otherhand, the adhesive may be ensured not to be coated to a region withinthe range of the second protrusion 1422 to prevent the adhere from beingcoated to a position where the pressure relief mechanism 213 is located,thus ensuring that the adhesive can be coated to a proper positionefficiently and accurately. In addition, the adhesive coated in therange of the second protrusion 1422 is reduced during the adhesivecoating process, which can reduce the adhesive that may be applied tothe first protrusion 1421, thereby preventing the adhesive from enteringbetween the pressure relief mechanism 213 and the attachment component.

According to some preferred embodiments of the present application, theisolation component 14 and the protrusion 142 therein may adopt one ormore of the following specific designs, materials or preparationprocesses, and the isolation component 14 according to the followingpreferred examples may be applied to any of the foregoing embodiments ofthe present application in principle.

In some preferred embodiments, a height of the protrusion 142 in theisolation component 14 may be greater than or equal to a predeterminedapplication height of the adhesive, which ensures that the adhesive willnot enter or a small amount of adhesive enters a region between thepressure relief mechanism 213 and the attachment component when theadhesive is applied, and it is especially advantageous when theavoidance structure 134 c is disposed in the attachment component. Inaddition, the protrusion 142 is also configured to be capable of beingcompressed when the battery cell 20 is attached to the attachmentcomponent, to have a height consistent with that of the adhesive,thereby ensuring the connection between the attachment component and thebattery cell 20. Typically, the protrusion 142 may have a heightslightly greater than the predetermined application height of theadhesive before the battery cell 20 is attached to the attachmentcomponent of the battery. When the battery cell 20 and the attachmentcomponent of the battery are glued and pressed or engaged by theadhesive coated on adhesive surfaces, with adhesive surfaces of thebattery cell 20 and the attachment component of the battery that aresubstantially parallel to each other, the protrusion 142 may becompressed to a height consistent with the adhesive by simply pressing.At this time, no gap is left between the adhesive surfaces of thebattery cell 20 and the attachment component of the battery by theprotrusion 142, thereby ensuring that the adhesive is isolated from aregion where the pressure relief mechanism 213 is actuated and wherechannel for the emissions is formed.

In some preferred embodiments of the present application, the isolationcomponent 14 may be made of a thermoplastic material by a blisterprocess. This helps to simplify a manufacturing process of the isolationcomponent 14 and reduce the costs. Moreover, for the isolation component14 including the main body 141 and the plurality of protrusions 142, itis particularly economical to produce such an isolation component 14 byusing the thermoplastic material through the blister process. Forexample, the plurality of protrusions 142 may be processed and formed ona piece of thin sheet or film made of the thermoplastic material by theblister process on the basis of the piece of thin sheet or film, so asto produce the isolation component 14.

In some embodiments, the isolation component 14 is also made of amaterial which is easily damaged by the emissions from the battery cell20, so that the emissions can easily break through the isolationcomponent 14. Alternatively, the protrusion 142 or the whole isolationcomponent 14 may be made of materials or structures which are easilydamaged by high-temperature and high-pressure emissions or have lowpenetration strength. According to some preferred embodiments, theprotrusion 142 or the whole isolation component 14 may be made of athermoplastic material with a melting point not higher than a dischargetemperature of the emissions, so that the isolation component 14 hasrelatively high structural strength in a general use state wherethermally runaway does not occur in the battery cell 20, and can bereliably damaged by the high-temperature and high-pressure emissions ina relatively short time in an emergency case where thermally runawayoccurs in the battery cell 20.

It can be understood that, expect that the isolation component 14 mayadopt the structure including the main body 141 and the protrusion 142protruding from the surface of the main body 141, according to someother embodiments, the isolation component 14 may also adopt a structurewithout the protrusion 142, but a special coating layer such as anadhesive-repellent layer, for preventing the adhesive from being appliedbetween the attachment component and the pressure relief mechanism 213is disposed at a position corresponding to the protrusion 142 in theforegoing embodiments. In other words, in these embodiments, a regioncoated with the adhesive-repellent layer covers at least a peripheraledge of a side of each avoidance chamber 134 a facing the correspondingpressure relief mechanism 213, or at least covers the actuation regionor the relief region of the pressure relief mechanism 213.

Certainly, according to some other embodiments, on the basis of theisolation component 14 including the main body 141 and the protrusion142 protruding from the surface of the main body 141, anadhesive-repellent layer may be further disposed on the surface of theprotrusion 142, so as to more reliably isolate the adhesive from theactuation region where the pressure relief mechanism 213 is actuated andwhere a channel for the emissions is formed or isolate the adhesive fromthe avoidance chamber 134 a.

The battery according to the embodiments of the present application isdescribed above with reference to FIGS. 1 to 35 , and a method anddevice for producing a battery according to embodiments of the presentapplication will be described below with reference to FIGS. 36 and 37 .For the parts that are not described in detail, reference is made to theforegoing embodiments.

Specifically, FIG. 36 shows a schematic flowchart of a method 300 forproducing a battery according to an embodiment of the presentapplication. As shown in FIG. 36 , the method 300 includes: 301,providing a plurality of battery cells, at least one battery cell of theplurality of battery cells including a pressure relief mechanismconfigured to be capable of being actuated when an internal pressure ortemperature of the battery cell reaches a threshold, to relieve theinternal pressure; 302, providing an attachment component adapted to beattached to the battery cell by an adhesive; 303, providing an isolationcomponent configured to be capable of preventing the adhesive from beingapplied between the attachment component and the pressure reliefmechanism; and 304, applying the adhesive to attach the battery cell tothe attachment component.

By providing the isolation component, it is possible to prevent theadhesive from being applied between the attachment component and thepressure relief mechanism in an effective manner in a process of batteryproduction. Meanwhile, application efficiency and accuracy of theadhesive could be improved, thereby improving production efficiency ofthe battery.

In some embodiments, the pressure relief mechanism has an actuationregion, and the pressure relief mechanism is configured, when theinternal pressure or temperature of the battery cell reaches thethreshold, to be capable of forming a relief channel for relieving theinternal pressure in the actuation region; and the isolation componenthas a main body and a protrusion arranged to protrude from a surface ofthe main body, the protrusion is arranged to correspond to a position ofthe actuation region of the pressure relief mechanism, and theprotrusion is configured to at least surround the actuation region toprevent the adhesive from entering the actuation region.

In some embodiments, the attachment component includes an avoidancestructure configured to provide a space allowing the pressure reliefmechanism to be actuated, and an avoidance chamber is formed between theavoidance structure and the pressure relief mechanism; and the isolationcomponent has a main body and a protrusion arranged to protrude from asurface of the main body, the protrusion is arranged to correspond to aposition of the avoidance chamber, and the protrusion is configured toat least surround a peripheral edge of a side of the avoidance chamberfacing the pressure relief mechanism to prevent the adhesive fromentering the avoidance chamber.

Based on the foregoing embodiments, it is possible to prevent theadhesive from being applied to a surface of the pressure reliefmechanism or an avoidance chamber in a simple and effective manner in aprocess of battery production, thereby avoiding the adhesive fromhindering the pressure relief mechanism when it is actuated.

Moreover, an isolation component may be flexibly processed andmanufactured according to actual needs, so that the manufactured singleisolation component can achieve the effect of isolating the adhesivewith a plurality of protrusions respectively corresponding to actuationregions of a plurality of pressure relief mechanisms or respectivelycorresponding to a plurality of avoidance chambers, which is helpful forreducing the production costs.

In some preferred embodiments, the providing the isolation componentincludes forming the protrusion on the surface of the main body by ablister process. By adopting the blister process, the required isolationcomponent may be processed and manufactured conveniently and at a lowcost. For the manufacture of a single isolation component provided witha plurality of protrusions, this processing and manufacturing advantageis particularly remarkable.

FIG. 37 shows a schematic block diagram of a device 400 for producing abattery according to an embodiment of the present application. As shownin FIG. 37 , the device 400 according to some embodiments of the presentapplication includes: a battery cell production module 401 for producinga plurality of battery cells, at least one battery cell of the pluralityof battery cells including: a pressure relief mechanism configured to becapable of being actuated when an internal pressure or temperature ofthe battery cell reaches a threshold, to relieve the internal pressure;an attachment component production module 402 for producing anattachment component adapted to be attached to the battery cell by anadhesive; an isolation component production module 403 for producing anisolation component configured to be capable of preventing the adhesivefrom being applied between the attachment component and the pressurerelief mechanism; and an assembling module 404 for mounting and fixingthe isolation component relative to the battery cell or the attachmentcomponent, and applying the adhesive to attach the battery cell to theattachment component.

It should finally be noted that the foregoing embodiments are merelyintended for illustrating rather than limiting the technical solutionsof the present application. Although the present application isdescribed in detail with reference to the foregoing embodiments, thoseof ordinary skill in the art should understand that they may still makemodifications to the technical solutions described in the foregoingembodiments or make equivalent substitutions to some technical featuresthereof, but these modifications or substitutions can be made to therespective technical solutions without departing from the spirit andscope of the technical solutions of the embodiments of the presentapplication.

What is claimed is:
 1. A battery, comprising: a battery cell,comprising: a pressure relief mechanism configured to be actuated whenan internal pressure or temperature of the battery cell reaches athreshold, to relieve the internal pressure; an attachment component; anadhesive configured to attach the attachment component to the batterycell; and an isolation component, comprising a main body and aprotrusion arranged to protrude from a surface of the main body, whereinthe protrusion is arranged to correspond to the pressure reliefmechanism, so as to prevent the adhesive from being applied between theattachment component and the pressure relief mechanism; wherein theprotrusion comprises a first protrusion and a second protrusion, thefirst protrusion corresponds to a position of the pressure reliefmechanism, the second protrusion is arranged around the firstprotrusion, and the first protrusion and the second protrusion areconfigured to prevent the adhesive from being applied between theattachment component and the pressure relief mechanism; wherein a grooveis formed between the first protrusion and the second protrusion, thegroove is configured to accommodate at least part of the adhesive toprevent the adhesive from entering between the attachment component andthe pressure relief mechanism.
 2. The battery according to claim 1,wherein the pressure relief mechanism has an actuation region, and thepressure relief mechanism is configured, when the internal pressure ortemperature of the battery cell reaches the threshold, to form a reliefchannel for relieving the internal pressure in the actuation region. 3.The battery according to claim 2, wherein the isolation component isconfigured to at least surround the actuation region to prevent theadhesive from entering the actuation region.
 4. The battery according toclaim 2, wherein the protrusion is arranged to correspond to a positionof the actuation region of the pressure relief mechanism, and theprotrusion is configured to at least surround the actuation region toprevent the adhesive from entering the actuation region.
 5. The batteryaccording to claim 1, wherein the second protrusion comprises: a firstside wall configured to be connected to the main body, the first sidewall being a wall shared by the second protrusion and the groove; asecond side wall configured to be connected to the main body, the secondside wall being arranged opposite to the first side wall; and aconnecting wall configured to connect the first side wall and the secondside wall.
 6. The battery according to claim 5, wherein at least one ofthe first side wall and the second side wall comprises a firstprojection, and the first projection is arranged to protrude in a firstdirection, wherein the first direction is perpendicular to a protrudingdirection of the second protrusion.
 7. The battery according to claim 5,wherein at least one of the first side wall and the second side wall isarranged obliquely relative to a direction in which the attachmentcomponent faces the battery cell.
 8. The battery according to claim 5,wherein the connecting wall comprises a second projection, the secondprojection is arranged to protrude in a direction in which theattachment component faces the battery cell, or arranged to protrude ina direction in which the battery cell faces the attachment component. 9.The battery according to claim 5, wherein the second protrusioncomprises a cavity, at least one of the first side wall, the second sidewall and the connecting wall is provided with an opening, and theopening is in communication with the cavity, so that at least part ofthe adhesive enters the cavity through the opening.
 10. The batteryaccording to claim 5, wherein the first protrusion comprises: a thirdside wall configured to be connected to the main body, the third sidewall being a wall shared by the first protrusion and the groove, and thethird side wall being arranged opposite to the first side wall; whereinthe third side wall comprises a third projection, the third projectionis arranged to protrude in a first direction, and the first direction isperpendicular to a protruding direction of the second protrusion; and/orthe third side wall is arranged obliquely relative to a direction inwhich the attachment component faces the battery cell.
 11. The batteryaccording to claim 1, wherein the second protrusion is an annularstructure.
 12. The battery according to claim 1, wherein the secondprotrusion is an elastic component attached to the surface of the mainbody.
 13. The battery according to claim 1, wherein the protrusionfurther comprises a third protrusion, and the third protrusion isarranged around the second protrusion.
 14. The battery according toclaim 4, wherein a through hole is disposed on a wall of the protrusionfacing the pressure relief mechanism, and the through hole is configuredsuch that emissions from the battery cell pass through the isolationcomponent when the pressure relief mechanism is actuated.
 15. Thebattery according to claim 14, wherein the through hole is arrangedaround the pressure relief mechanism to prevent the adhesive fromentering between the pressure relief mechanism and the attachmentcomponent.
 16. The battery according to claim 4, wherein the batterycomprises a plurality of battery cells, and each of the plurality ofbattery cells comprises the pressure relief mechanism; and the isolationcomponent comprises at least one protrusion; wherein the protrusion isin one-to-one correspondence to the pressure relief mechanism, or theprotrusion corresponds to at least two pressure relief mechanisms. 17.An apparatus comprising: a battery, comprising: a battery cell,comprising: a pressure relief mechanism configured to be capable ofbeing actuated when an internal pressure or temperature of the batterycell reaches a threshold, to relieve the internal pressure; anattachment; an adhesive configured to attach the attachment component tothe battery cell; and an isolation component, comprising a main body anda protrusion arranged to protrude from a surface of the main body,wherein the protrusion is arranged to correspond to the pressure reliefmechanism, so as to be capable of preventing the adhesive from beingapplied between the attachment component and the pressure reliefmechanism; wherein the protrusion comprises a first protrusion and asecond protrusion, the first protrusion corresponds to a position of thepressure relief mechanism, the second protrusion is arranged around thefirst protrusion, and the first protrusion and the second protrusion areconfigured to prevent the adhesive from being applied between theattachment component and the pressure relief mechanism, a groove isformed between the first protrusion and the second protrusion, thegroove is configured to accommodate at least part of the adhesive toprevent the adhesive from entering between the attachment component andthe pressure relief mechanism; and wherein the battery being configuredto provide electrical energy.
 18. A device for producing a battery,comprising: a battery cell production module for producing a pluralityof battery cells, at least one battery cell of the plurality of batterycells comprising: a pressure relief mechanism configured to be actuatedwhen an internal pressure or temperature of the battery cell reaches athreshold, to relieve the internal pressure; an attachment componentproduction module for producing an attachment component; an adhesiveproduction module for producing an adhesive configured to attach theattachment component to the battery cell; an isolation componentproduction module for producing an isolation component, wherein theisolation component has a main body and a protrusion arranged toprotrude from a surface of the main body, wherein the protrusion isarranged to correspond to the pressure relief mechanism, so as toprevent the adhesive from being applied between the attachment componentand the pressure relief mechanism; wherein the protrusion comprises afirst protrusion and a second protrusion, the first protrusioncorresponds to a position of the pressure relief mechanism, the secondprotrusion is arranged around the first protrusion, and the firstprotrusion and the second protrusion are configured to prevent theadhesive from being applied between the attachment component and thepressure relief mechanism, a groove is formed between the firstprotrusion and the second protrusion, the groove is configured toaccommodate at least part of the adhesive to prevent the adhesive fromentering between the attachment component and the pressure reliefmechanism; and an assembling module for mounting and fixing theisolation component relative to the battery cell or the attachmentcomponent, and applying the adhesive to attach the battery cell to theattachment component.